I have spent a lot of time researching IGH on the Internet to try to figure out which one can take the most abuse. Time and again the hub that people mentioned as the toughest was the Nexus 3. There are people who claim to have run several thousand watts through these hubs for sustained periods without any real problems or failures. The most critical thing that I found is to make sure you’re not running too much power and load on them at the same time as you are shifting. This IGH was very light and with the shifter only added about 2 lbs to my bike. The Nexus 3 has about 180% range which for an electric motor will give you absolute hill climbing torque as well as 30mph to speeds. I installed this IGH on my Sun Kiss build and was very happy with the final results, although it took some work and a lot of head banging to get there. (and I’m not talking about Iron Maiden either)
If you haven’t done a wheel lacing on a fat bike rim, then it is something you should totally struggle through before you die. As my old man used to say “It will grow hair on your chest”, of course, everything was supposed to grow hair on my chest and disappointingly nothing ever did. At 44 I’m still a mostly chest-hair-free giant upright Mongoloid. I spent about 3 hours getting this wheel build right and I was very happy to discover that I could use the spokes that shipped with my Deadeye Monster and if I did a triple cross instead of a double cross (that it shipped with) then they would work. It took me quite a while with a spoke calculator to figure that out, it would probably take you a lot less time because you are so much smarter (and I just told you). There are a lot of spoke calculators on the Internet, but I have yet to find one that I really like. I would give you the links to the sites that helped me figure this out, but I can’t find them and my computer is a pig-sty.
At around $120 for the whole setup, the price for the Nexus 3 was right. I needed a total of 3 items.
- The Nexus 3 which I bought from Amazon for $82.43 right here.
- Revo shifter for $12.65 located here
- The Centerlock disc brake adapter for $17.95 (highway robbery) located here. I didn’t want to cheap out on the Centerlock adapter and there are several options that are much less expensive, or you can opt for a real center lock brake rotor if you want, which means there is no adapter and the rotor just mounts directly to the Nexus-3. I probably should have done that in retrospect.
The Grip shifter was pretty lame and occasionally would shift on its own without too much input. There was very little resistance to shifting between gears and you have to brace against the shifter when you are pulling on the rear brake which it seems like I am always doing in the woods. If there was another option to go with the Nexus 3 I would use it, but alas there is none.
The wheel build up was a real PITA but the real test was when I tried to get the tire on the bike. I sized the tire down from the old Surly Lou that was on the rear of my trusty Sun Kiss build to a Snow Shoe 4.5. The Lou just barely fit in the chainstays and was barely rubbing on both sides. As the tubeless tire aged it seemed that the rubbing problems worsened to the point where the nubs on the tire were actually starting to wear down. The 4.5 Snow Shoe is much narrower at less than 4 inches on a 50mm rim. It seemed to fit quite well in the dropouts without any rubbing and lots of room to spare. Although the Lou is a much better tire in every way than the Snow Shoe, I went with the tire that I knew was going to be lower maintenance over time on this frame.
The adjustment of the shifter took about all of 2 seconds. Put it in 2nd gear and line up the yellow line in the window. It was the easiest shifter adjustment I’ve ever done hands down.
My original Sun Kiss build had a crappy chain line and the rear cog was in about 14mm from the frame. This meant that I had to keep a lot of tension on the chain to keep the chain and also meant that when the frame would flex I would get some chain rub on the massive Lou tire. With the Nexus 3 I was determined to move the rear cog as close as I could to the frame of the bike. When I originally mounted the Nexus 3 the way it was meant to be installed the chain line was WAY off. I had to take off the nut on the drive side which gave me almost 10mm and then I had to use a grinder to make the dropouts on the drive side wider so they could fit the thicker part of the Nexus 3 axle on the drive side. After grinding for a while and having the axle still not fit, I decided to grind off the threads on the top and bottom of the axle so it would slide in. When you do this you have to make sure the alignment nut is installed on the opposite side so the axle is lined up properly before you start taking off the threads. It was a little tricky, but in the end it worked quite well. I added lots of washers on the non-drive side then ended up pinching the dropouts together a few mm to get it to fit. The rear brake alignment was massively messed up and I had to put some huge spacers and much longer bolts to mount the disc brake properly.
The Nexus 3 will not work properly with rear dropouts that are wider than the 135mm standard. There is a 3 speed Sturmey Archer IGH that is designed for 170mm fat bikes that I have and will be testing beating on in the not to distant future (if Eric ever gets around to shipping me another BBSHD) so stay tuned for that.
I took 4 links out of the chain to go from a 22T in the rear to the 19T that the Nexus 3 came with. Incidentally, there are other sized cogs like a 23T located here that costs $6 if you want more torque or if you want to use a larger chain wheel in the front. I’ve not been that happy with the 32T chainring in the front as it doesn’t fit well with the adapter and the teeth are wearing down very fast, for a steel ring. With a BBSHD I would strongly advise going with the 23T cog and probably the smallest chainring you’re going to be able to put up front is a 38T. The BBSHD produces a lot more power at lower RPM ranges so that combination should be fine.
But how did it ride?
In short, I really liked it. If you were stalled out on a 30-degree slope and tried to take off again in the lowest gear the Nexus 3 would click and grind a lot and wouldn’t really move. If it wasn’t under massive load like that and were riding normally, then the Nexus 3 behaved exactly the way you would think it should. I spent almost all my time in 2nd gear with a comfortable pedaling cadence. When I hit a hill that was over 10 percent grade I would shift into 1 and scoot right up. As long as I didn’t stall out then the unit seemed to work just fine, even on the insanely steep stuff. As soon as I stalled out on steep inclines I quickly learned I had to dismount and push the bike up to the top. This has only happened a few times to me, I learn fast.
On level ground the bike easily hit 25mph with a comfortable pedaling cadence. On the downhill, the bike would go faster than I felt safe going and the pedaling cadence was much too fast to keep up with. With a 32T front ring and a 19T rear I found that was a good match for singletrack trail riding. If you wanted to build a street machine only with a BBSHD you could easily shift it to a 46T front and a 23T rear and have much higher top speeds and still easily climb any paved hill you were likely to find. because electric motors have such a wide range of power over such a large RPM range they make an excellent candidate for a 3-speed IGH. My original single speed Sun Kiss would top out at around 15mph and didn’t have the hill climbing prowess that it had with the Nexus 3 installed.
I was able to get the cog within about 11mm of the bike frame which was about 3 mm closer than the stock Deadeye Monster without an IGH. When I went riding with it I had zero chain issues even though I ran it much looser than I had with the original build. This build is still one of the best you can get for ~$1000 when you realize you can buy the bike for $399 shipped, get the Nexus 3 IGH for about $120 shipped and the BBS02 for only $535. Add another $265 and throw on a BBSHD instead and you’ll be really cooking with gas. I’ve heard that the newest Deadeye Monsters ship with 80mm rims and a 100mm BB instead of the 50mm rims and the 68mm BB you see here (the website specs are wrong, ignore them). 100mm BB means that the only choice for this build that makes any sense is really the BBSHD as the 100mm BBS02 conversion kits are more expensive and could be more prone to issues. My advice if you want to do ANY conversion is to buy the damn bike first and make SURE you know what you’ve got before you buy a motor and anything else.
The Nexus-3 will only work with dropouts that accept threaded or quick release axles and will NOT work with through hole axles. Be aware that with a single speed IGH you will want either horizontal dropouts or a chain tensioner as otherwise it will be impossible to get the chain tension right. A loose chain at high power makes for all kinds of problems.
Now that I’ve seen how well that a Nexus 3 IGH can work, it’s unlikely that there will be any more single speeds in my future.
I’m also looking forward to a winter without frozen derailleur wheels. (true story)
Ride On.
Update: I’ve spent many hours trying to get the BBSHD to work properly with the Nexus3 IGH on a Deadeye Monster with a 68mm BB and have finally given up. No matter which chainwheel I use and how I try to line up the rear cog I can’t get the chainline to work well enough so that it doesn’t fall off at least once per ride. You might have better luck, but I doubt you will as the 100mm version of the Deadeye Monster is going to have a chainline that is even worse. I cannot recommend the Nexus-3 with the BBSHD on a fatbike frame, although it should be fine on a normal bike frame.
Pingback: Sun Kiss – Deadeye Monster DIY BBS02 42lb Single-Track Snow Machine $900 (w/o Batteries) | Electric-FatBike.com
http://www.amazon.com/Sturmey-Archer-Shifter-Shimano-3-Speed/dp/B0054ECMS0
LikeLike
Thanks James, I’ll order one. On the wifey’s credit card…Ain’t love grand?
I’ll post about how much I love it here, but I already destroyed my ESI chunky handgrip!
LikeLike
Great news Karl. Thanks for the links and info. I have always thought 3 speeds are plenty for a 1500 watt set up. I will try a 3 speed IGH for sure now that I hear this. The kind of riding I do I would most likely just leave it in 2nd gear for single track trail riding (as I understand 2nd gear is the strongest as its direct) and then use 3 rd gear for kind of an overdrive on the road. As I only want 25mph as a top speed I may just go bigger sprocket on the IGH. I will be running a 42 up front. ………..wayne
LikeLike
Can I ask what cog will you use in the back? I am going with the same setup I will be using the lekky 42T front but dont know what rear cog to use I want speed and torque also
LikeLike
For trailriding get the biggest you can (I think I used a 23T I got on ebay). If it’s just commutting you could get away with something smaller. Nothing less than 18T though.
Karl
LikeLike
Karl most of my commuting routes are hills would that have enough torque for climbing hells?
LikeLike
Another awesome article with no BS. The Nexus 3-speed is a 1:1 gear in 2nd, first gear is an underdrive (cog spins faster than the wheel) and 3rd is an overdrive. If you like popping wheelies and are willing to risk the teeth breaking, size the chainring to do your drag-racing in 2nd, since the even tooth-loading will provide the maximum “it didn’t break” power.
LikeLike
yes great story…there is not enough people out there beating the hell out of ighs and writing about it. Great job Karl…. i love the reference if i ever get around to shipping bbshd….made me laugh 🙂
LikeLike
Pingback: Finally, A BBSHD Chainring That Doesn’t Suck : Luna Eclipse | Electric-FatBike.com
Pingback: 2015 : A Nucking Futz Year For Electric Fatbikes and 2016 Looks Even Better | Electric-FatBike.com
Pingback: NuVinci N380 & The BBS02 : “We’ve Got The Biggest Balls Of Them All” | Electric-FatBike.com
Pingback: Burning Chrome – DIY 3000W Cyclone Soul Stomper 3 speed IGH ~$1268 63lbs w/ out battery | Electric-FatBike.com
Pingback: SX-RK3 Sturmey Archer’s 3 Speed IGH For Fatties : It’s Got The Power *dum* *dum* *da* *da* *dum* | Electric-FatBike.com
Pingback: How To Reprogram Your BBS02BBSHD So You Can Use Pedal Assist On SingleTrack Without Getting Killed | Electric-FatBike.com
Pingback: It’s My Mid-Drive And I’ll Fry If I Want To : The BBS02, BBSHD & Cyclone Shopping Guide | Electric-FatBike.com
Pingback: The Dark Side – DIY Cyclone 3000W Nuvinci N171 Deadeye Monster ~$889 57lbs w/ out battery | Electric-FatBike.com
Pingback: Is The Gearsensor A Total Waste Of Money Or A Must Have? | ElectricBike-Blog.com
Hi. I’m interested in the NON-fat tire version of this hub or the Sturmey Archer one. I built a BBS02 on an old HooKooEkoo as a urban commuter. (which cruises w my 52 tooth chainring) I currently have a 9 speed cassette that seems to be getting some abuse from the motor and skips when shifting. (Maybe it is old junker). But really, who needs 9 speeds with a motor. I just need Uphill, Downhill and Cruise mode and rather have a smooth chain line.
Suggestion on a 3 speed IGH that can take the abuse and is not a honker?
LikeLike
Hi. I’m interested in the NON-fat tire version of this hub or the Sturmey Archer one. I built a BBS02 on an old HooKooEkoo as a urban commuter. (which cruises w my 52 tooth chainring) I currently have a 9 speed cassette that seems to be getting some abuse from the motor and skips when shifting. (Maybe it is an old junker). But really, who needs 9 speeds with a motor. I just need Uphill, Downhill and Cruise mode and rather have a smooth chain line.
Suggestion on a 3 speed IGH that can take the abuse and is not a honker?
LikeLike
Nexus 3 is awesome with the BBS02. There is a SA 3 speed for 130mm dropouts but I haven’t tested it. Probably bulletproof.
Karl
LikeLike
HI Karl, awesome article. Very informative! Based on this info, I bought the Nexus-3 for my recumbent Trike (HP Velotechnik.Scorpion FS 26″) I have BBSHD, 42T Lekkie Bling Ring, and 25T Rennen cog. I don’t need high speeds. Mostly running my dog on street with this thing and probably climbing steep fire/paved roads in SF Bay Area (no single track with trike.) I have brake and shifting motor delay wired up. Thanks to Matt Hughes from EMPoweredcycles.com for helping me with this rig. I should have the Nexus operational and two 13.5AH/52V Batteries on this trike within 2-3 weeks (by mid April ’18)
LikeLike
Pingback: Ba Ba Black Sheep : DIY 6000W Ascent Deadeye Monster Nexus-3 IGH ~$2868 45lbs w/ out Battery | ElectricBike-Blog.com
Pingback: Reminds Me Of A Ducati – 72v Cyclone Kit On A Luna Fatty Cargo Frame | ElectricBike-Blog.com
Pingback: 15 Tips To Having More Fun Than Everyone Else Electric Fatbiking In Snow | ElectricBike-Blog.com
Pingback: Destroy Everything You Touch : Managing The Repairs On Your Ebike Fleet | ElectricBike-Blog.com
First time commenting. Your posts have consumed one of my weekends already 🙂
I’m to get an e-Bike for commuting here in Portland, OR. One thing led to another and now I’m thinking of getting a cheapo bike and putting a BBSo2 on it. I’m thinking about getting this Windsor commuter with a Nexus 3 on it. http://www.bikesdirect.com/products/windsor/oxford-city-bike-sale.htm
I’m guessing it should be no problem to install and run a BBSo2 on this bike? Thanks!
LikeLike
Should work as long as it doesn’t have the coaster brake which it doesn’t. Not a fan of rim brakes but it will work.
LikeLike
Thanks! Should have done a little more research and found someone had verified install. Although, it sounds like the tires couldn’t support 200+ lb person plus motor+battery and they moved it over to a mtb instead.
https://electricbike.com/forum/forum/builds/ebike-building-directions/7635-bikes-that-are-compatible-with-a-bbshd-and-bbso2-kits?p=22176#post22176
LikeLike
Karl I just got into the bike scene and end up getting the cyclone 3000W of Craigslist for 250.00 after trying to figure things out what would your recommendations be nexus or the sturmey archer? I am going to be putting this motor on an Electra townie and would like to make this a daily rider to work and what I am going to use this is to help me climb up hills. Your opinion would be much appreciated also I am going to have a local bike shop install this due to me being impatient lol.
LikeLike
If you have normal 135mm dropouts go with the Nexus otherwise go with the Sturmey Archer. You can’t go wrong with a 3 speed IGH.
LikeLike
Thanks for your help just want it to be an awesome commuter for work and play.
LikeLike
Karl does it matter what nexus IGH I use? Was looking it up and there are so many options.
LikeLike
Karl what do you think of the nuvinci N330 IGH? i am going to try and take a leap and i end up getting a priority bike that has the nuvinci N330 and a gates belt drive and and i am going to have a bike shop put in the BBSHD instead of doing it myself can you give me your ipion on the hub i have been looking online and hearing horror story. like i said i want to only use this setup to climb hills and not go all balls out on speed.
thanks
chuck
LikeLike
I would stick with a 3 speed IGH
LikeLike
Karl I guess I am just going to get a beater end up getting a Electra townie for 50 bucks so I am going to overhaul it and looking for a 3spd nexus, is there a 3spd nexus hub that doesn’t have a coaster brake.
Thanks
LikeLike
Very interesting blog, been reading post after post for the past few days.
I do have a question. I would like to install a Nexus-3 on my downhill bike but it has a through hole axle.
Are there any adapters available by your knowledge to convert my through hole axles in order for me to fit the Nexus 3?
Thanks!
LikeLike
Not that I’m aware of. If you have a through hole hub you can go to a QR skewer (I’ve done it) but I don’t think you can go the other way.
LikeLike
The “Update” above is concerning…Nexus 3 cannot be recommended for a fat bike frame with the BBSHD but should be fine for a normal bike…
Would a single speed 29+ that accepts up to a 3.8 inch rear tire likely be a fat bike frame that will not work with the Nexus 3 and a BBSHD?
If yes, has anyone solved the chain falling off problem?
LikeLike
Hmm I have so many bikes I can’t remember them all. Pretty sure I goy that setup to work with a BBS02, the HD probably won’t work. too much offset…
LikeLike
I have a standard nexus three speed bike with coaster brake and generator disc brake front wheel. I have considered Bafang center drive.But i cant wrap my head around the strange free wheel system in add+on mid drive kits. Can I combine my Nexus 3v with a center drive or do i have to get special not coaster brake nexus rear hub. In which i would scrap whole idea and just replace front wheel? I hope I can use mid drive. But cant zero in on this. Thank you. Steve
LikeLike
Coaster brake won’t work with a mid-drive, they freewheel when you pedal backward. Disc brake model only.
LikeLike
their is a mid-drive, made by TongSheng designed for coaster brake model tsdz2 36volt 350 watt about 315 bucks without battery.
LikeLike
hey Karl been awhile guy, finaly got into building my bike i guess i will be using the 46T that came with the motor, can i use the 23T rear cog? would that be good for speed and torque for climbing this would be my all season commute fat bike.
LikeLike
I think you will be happy with that.
LikeLike
Karl one more thing did you use the shift sensor with yours on this nexus build? i am debating about using it and not using it and what the issues it would cause me. i mean you have to stop pedaling before you can shift anyway.
LikeLike
I did not use a shift sensor. I’ve blown out a couple nexus-3’s over the last 5 years but I still think they are the best IGH out there for high power ebikes.
LikeLike
ok thank you i guess i will for go that for now since it looks like its a pain in the ass to take the cable out and cutting the cable.
thanks
LikeLike
Hello
Interesting reading your no-BS articles.
I am looking for a good igh hub to power a cargo bike. Cargo bike will be powered by a bafang ultra max at normal 1000W (already 4 times the legal limit here, don’t tell) Probably with your ‘Special sauce’ but no hot rodding.
The igh will be used as a jackshaft spinning at faster then needed to limit the torque going through it. Then a gearing to the rear wheel to make the wheel turn ‘normal’.
Want to use the cargo bike as a fast commuter going 45kph (28mph) but still be able to do the lots of gravel roads and double track forrest roads near me.
Would really apreciate some advice on this since there isn’t much info of this combination.
Regards
Matthias
LikeLike
I would go with a good 3 speed IGH. Not sure why you would need a jack shaft, just put a smaller chainwheel on the Ultra Max for more Torque, Christini cycles makes one. The Nexus 3 is solid or if you have a 170mm rear then the Sturmey archer. I haven’t had a lot of luck with 7 or 8 speed IGHs.
LikeLike
This is because I will use that igh-jackshaft as a PTO to power the front wheels when needed/wanted. This has the added advantage that I can reduce the torque going through the IGH by spinning is faster then is needed.
Would a nuvice N171 (if i can find it) or N380 be of use here?
It will be a 3×3 cargo bike. I like a challenge.
Regards
Matthias
LikeLike
Pingback: The Sun Pony is a Tri-motor Tandem Tricycle designed for Epic Long Distance Ebike Adventures | ELECTRICBIKE.COM
Pingback: The Sun Pony is a Tri-motor Tandem Tricycle designed for Epic Long Distance Ebike Adventures | Ebikez.co – Ebikez.co
Pingback: The Sun Pony is a Tri-motor Tandem Tricycle designed for Epic Long Distance Ebike Adventures – EV News Hubb
Pingback: The Sun Pony is a Tri-motor Tandem Tricycle designed for Epic Long Distance