BBSHD fitting Guide for Fatbikes - Part 1 - Sizing and Mounting

Published 2023-10-28
Fitting your BBSHD motor with a fatbike. This video looks at the size of BBSHD you will likely need in order to fit it to a Fatbike as well as some tips to make sure you get it on correctly and not have it come loose in operation.

The Fatbike in this video is a Specialized Fatboy. We are using the 120mm version of the BBSHD. This is the first of a series of videos that will go over all aspects of getting the BBSHD setup to give you ultimate electric fatbike.

If you are interested in building electric bikes and other LEVs you are welcome to join our Discord community highvoltagekits.com/discord

All Comments (21)
  • @lukewalker1051
    Your videos are the best and look forward to your High Voltage controller installation and what kind of amperage, voltage and performance you glean. Many companies and motors try to upstage the BBSHD but it is simply an outstanding powerhouse with great reliability for a very fair price. Who would expected this from China but my personal experience is undeniable and credit where credit is due.
  • @thechodfather
    Just wanted to mention that your non egotistical non complicated and non “look at me I’m so clever” approach makes your channel the best ive come across re diy electric bike related info… although i do respect mr grin over there as well…
  • @Eeeusers
    I'm looking forward to the Cables Management video :)
  • @Noname-ym1iq
    Cap, great that you made a video where you encounter problems with the installation, that's the way to do it, we all have these and others and good advice helps many first time installers!
  • @hiphopsuperman
    I watched this video totally address of blue. I have no intentions of converting a fat bike. But I did realize I totally did not tighten up my photon enough on the installation yesterday. Thank you! Went back, and it was quite loose!
  • @patrickbonin137
    So captain a step by step fitting of a BBSHD to a fatbike,cant wait to see the next one,brings back alot of memories,nice lekkie lock ring and nice fatbike...well done but I will be asking some awkward questions lol...nothing heavy just a few light shunting questions.❤😂
  • @websitemaker1717
    You can get M6 spacers available in 1mm length increments at McMaster-Carr for the bracket spacing. A little spiffier than stacking washers. Also thank you for saying out loud you need 80-90 ft lbs of torque on the stock inner lock ring. Thats something a lot of people don't believe is possible but its critical to doing an install that lasts. The Lekkie One Nut tightening tool is a deep socket version of the Park BB tool that doesn't have the problem you showed us in the video. And of course its not cheap.
  • This is great. Everyone says to just measure the width of the crank housing but you have proven that with a fat bike you need to allow for the frame width to allow clearance. I just checked my moped style e bike but the fat tire is well back from the crank housing. Could have cost me a major headache if I wasn't aware...Thanks a bunch!
  • @Frombie_01
    I bought a fat bike specifically for an ebike build. The plan is for the bike to be an allrounder, that is to commute 30 km to work (without being super sweaty), shopping trolley, camping and fishing vehicle and part time bush basher, with occasional trailer towing duties, all whilst backpacking my Maltese Terrier (a small dog with a big dog heart). All the things my current analogue Scott Aspect does. I've been overthinking the build for 18 months now. One of my main conundrums is what motor to get with the current proliferation of mid drives. I originally decided on the BBSHD, but was concerned about the stripping of the nylon gears. Then the CYC Photon, but now towards the back of the pack, but I like that the crank shaft can be changed to a 68-73 in the future. Finally the TwoSeven DM02, it's draw back is only available to fit a maximum 110 BB. I'm currently tossing up as to whether I should just do a cheap 750W - 1,000W build until there is more information on the new mid drives.
  • @LargeeeScaleLife
    Park makes one of those tools that actually looks a lot like a large wrench that is completely open and I believe the newest version actually has a spot where you can attach a torque wrench. If they don’t make one I know Pedros makes one. I’m not sure if it has the torque wrench attachment. It basically looks like one of the large spanner wrenches that you would use on an old-school threaded headset to adjust the headset. I have a couple of them in my shop. I’ll have to look and see if they actually have the torque wrench adapters.
  • @Gusto0172
    Thanks for yet another top vid. Interesting point with the non slippage without teeth on bracket. All of what you mentioned was same as my experience fitting the HD to my Norco BigFoot 2020 bike. I did not use a torque wrench, which is obviously a good method, but so far so good. Leckie locking ring is new to me, thanks for showing, great looking kit. I look fwd to hearing about your single speed modification which I presume would require the extra power from upgraded controller + 72 v to run it. I went for an 8 speed wide ratio MicroShift drive, cheap, strong, good performance, no issues + it helped overcome shifting the awkward chain line.
  • @Eeeusers
    Can't wait for the continuation of BBSHD on Fat series. Im converting my Northrock XCF with 100mm BBS02 as we speak. Very curious what size chain ring you're going to use. What cassette, 10 speed, Im guessing. Modified cassette for a better chain line perhaps? Battery fitting, unless you use the frame bag and a triangle battery.
  • I feel like this is where I came in. I started subscribing sometime during this build 1.0. Love the black makeover & the Lekkie blingification. Doesn't Lekkie make install tools (that fit their One Nut)? Loving the 2.0 build so far. Can't wait to see the finished product. Your High Voltage kit has admirable finesse, to allow a smooth throttle with a 42:42 setup. (My setup wants to lift the front wheel on throttle with that gearing and doesn't approach your top speed, even in higher gears.) As always, well done & I look forward to future vids (&builds).
  • I live in uk, I built myself same as your specialised fatbike , however i found standard factory bbshd is almost just about right. I also found fat bikes cannot handle speed anything more then 30mph is not stable at all, I reverted back to mountain bike!
  • @Eeeusers
    Great video. One question: do you mount the motor touching the bottom tube or prefer to put a little rubber block between the frame and the motor (to avoid possible noises due to the motor hitting the frame)?
  • @markkus1134
    You now can use the onenut instead of the stock two nuts I have the problem of a press fit 30 with a 46mm opening and it needs to be a 41 pf30 to BSA ???
  • @wallywest2360
    I have a similar frame on my Aventon Level. Which is already an E-bike, with a 500w hub motor. But I have been thinking of adding a mid drive, for more hill climbing power and top speed. I'd like to hit 40mph or so. Is that worth trying? And would a S02 be plenty or should I just get the HD? I would be adding another battery and controller. I think I would use pedal assist on the mid drive, and wire a throttle into both controllers so when using just throttle they're both running.
  • @SteezyG
    My fatbike has a 100mm BB with 20x4 inch wheels, I was thinking of getting the 100mm version of the bbshd but now Im confused how to check it'll work....
  • @Smegmeister
    i advise clients to go up to 80nm on the steel lockring, I can see that not liking anything like that much (alloy)