Custom E-bike Build: Specialized Roll w/ CYC Photon Mid Drive overview. Top Speed and Hill Climbing 

Ya the ds103 is nicer, but the sw102 is no slouch 😀

Yes, the new king of quiet

Nice.

Whats top speed with ur setup ?

Ebikes will be killed for.

In general, yes you should be fine. We deal with that stuff all the time. Worst case is you may need to run the cabling externally ☹️

Yes I will. They are on order 😀

I’d want more than just 3 speeds. Maybe a 5 speed with a wide enough gear ratio. I have some chainring adapters on my site. Can’t remember off the top if they are 104 though.

@@JohnnyNerdOut they are not. Only the factory chain rings will work. Supposedly they have a belt drive version coming out, but that was supposed to be released three months ago. This thing, with a belt drive, would be amazing as the alignment would be so awesome. It would have enough torque to pull stumps, but like Johnny intimated, you'd never really utilize its potential as commuter with the available Gates belt or cogs. I recently built a belt drive Momentum with a TSDZ2. It is quite remarkable. It was 104 so I was able to just swap factory for factory. You'd probably want to get an OSF programmed version as only EUNORAU is not using really weak factory programming right now and they are having some issues (had to return 6 of their motors).

Yes I am a CYC repair facility 😀

Yes. Pretty much every conversion kit offers that feature. At least the mid drives do.

Great questions I always mean to include that info but forgot. Even went and bought a bike scale! I’m 180# bike with battery is about 55#

www.johnnynerdout.com/product-page/hydraulic-brake-set-mtb-ebike-hydraulic-disc-brake-for-bafang-bbs

I’m sure you can find a motor that will fit with the right adapter. I’m only a little familiar with that bike.

@@JohnnyNerdOut thanks...do you have any ideas of where to source an adapter? I have scoured the internet and can only find a mount for the bafang ultra that needs to be aluminium welded after the old mount is cut off the bike, chain alignment would seem an issue with this method....thanks for your input

Links are in description, you will have to select from the drop-down menu unfortunately ☹️ You can also call or email us through the website and we can build you an invoice if you don’t want to go to page by page and adding stuff to the cart. I still like the 38t. I would probably go 42 if I had to do it all over again, but it’s not worth it to change it.

Thanks!@@JohnnyNerdOut I was able to figure it out, I have a 68mm BB and crank arms are easy to measure. I think I'll be able to order from the website, also to take advantage of that sweet Paypal financing... Interesting to hear that you would go with a 42T chainring if you had to redo it. I assume it is because you found yourself unable to keep up with the pedaling at higher speeds? Thanks for for feedback, my setup would have numerous steep hills to overcome, but looking at your "throttle-only" tests in this video, it sounds like hills shouldn't be a problem even with the higher chainring size. Will definitely give you a ring to ask about availability on certain parts in the shop for this build. Cannot wait to build my first e-bike! Thanks again for all the education you provide here.

​@@diver___if you have a lot of hills in your bike ride inwould go for more torque over top end and if you want the most torque possible then you need to go with a gear ratio of 1 to 1 meaning if you have a 32 tooth in rear then put a 32 tooth on the front

I’ve done a few. Just not many requests 🤔 bring yours down so we can make it a feature!

The 50t might keep up at 34mph. My 38t is good up to about 27-28 @90 rpm

@@JohnnyNerdOut Sheldon Brown's Gear Calculator says 25.6mph at 90rpm for your bike assuming you have an 11 tooth cog. A 60t chainring would be good for 40.4mph at 90rpm. 52x11 would be good for 35mph @ 90rpm.

@@georgekrpan3181 I’m assuming you got the correct tire size in there too? That sounds about right though

@@JohnnyNerdOut I think I assumed 2 inch tires. Cheers JNO!

@@georgekrpan3181 that's very close to what I'm seeing with a 26-2.4, 11t low gear, 34t photon at about 90rpm cadence. I'm really smoking myself out to pedal over 30mph. I've hit 31 on pedal with assist and My old knees were doing everything they could... no idea the cadence at that point. Near 40mph on throttle, working the gears a bit at 1500w. I sorta wish I'd have gone for about a 40t. I think on a 29er a 34-36 would be perfect.

No

Yes you can, get the 120mm bbshd. There are a few pf30 adapters out there. The Lekkie one works but is designed for a 68mm so it’s not perfect/ideal.

@@JohnnyNerdOut How many spacers do you recommend to clear the chainstay

Yes we ship bikes. Please call the shop to get more info 😀check the bottom of our home page for contact info 👍

It os 50% lighter than The BBSHD (hamdling)handling, is quieter, fits more unique frames and allows for a perfect chain line on commuter, road and many gravel frames. Because it is torque sensing, there is no need for a shift or brake sensor, so it makes for a much, much cleaner, easier, faster install. My biggest complaint with Bafang are all those little extras and the fact that they respond so absurdly slow. I have a customer with a 12 speed Rosco (about $3k before the motor). It shifts close to stock and there is little perceptible run on (in these two things The TSDZ2's torque sensor is superior).

As a dealer I can. But we will see how it is for customers in be future…

All in about $2300 including bike

@@JohnnyNerdOut oh wow that's much better than I thought thank you

~$1500

Call the shop😀

@@JohnnyNerdOut I DMed you on Instangram

I'm also 6'8", so that could come into play.

You may want to check out day6 bikes or zize bikes and converting one if performance, customization and price are important. If you prefer something to be assembled shipped to you the himiway may be the better option.

Damn, I was hoping you’d say to go with the Roll… and give me some ammo to convince the wife. I love my Roll and have high hopes of getting back down under 300 lbs.

I ride a tongsheng 500w in Phoenix ambient Temps over 110 average speeds around 15 to 20 and never overheat...plus at 240 I'm no lightweight. What gives?

I'm suspicious of the open source firmware ours are setup with - I've dialed back the amps/watts settings way below the osf recommendations so will see if that keeps them from burning up. @@vibs1614

So show I wasn’t pedaling.

@@JohnnyNerdOut It didn't look like you were pedaling on the street either. Is there a freewheel on the front gear so you don't need to pedal when using the throttle?

@@JRP3 Of course yes, you can put your feet on the pedals and throttle without pedaling, or use both etc. Only thing about this system is the chain only goes forward so when lubing chains you have to lift bike and pedal forward. When spinning pedals opposite way, the free wheel spins and chain stays in place.

@@MrDearCandy That's what I thought and why I was confused that he had his feet off the pedal for the hill climb. It would be obvious that his feet weren't moving if he just kept them on the pedals and used them as foot pegs.

@@JRP3 yes. All mid drives have a freewheeling crank

I always suggest using brake cutoffs and a gear shift sensor on any build if at all possible.

My experience so far is that I have no need for a brake sensor. I've a tendency (thanks to motorsports) to just barely ride the brake lever. Which was giving me cut out problems the first week or so with the Photon before I figured out I was even doing it. It'd be better if you could set the range or sensitivity on the brake sensors. But I only have a mil or two of clearance and just barely touching the lever set the sensor off. That along with the delay in motor "ramp" made it surge a bit. But, it's nice you can just turn off the sensors when you're riding it via app, and maybe turn it back on for a newb riding it. I've considered running just the front brake lever sensor and killing the rear. But currently, no need to re-engage after a few weeks riding without.

When the conditions are right, 40mph is achievable.