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To the OP, I hope you end up loving your new bike. Everyone has their order of priorities but that bike seems to sacrifice a lot for the reduced weight vs a full power, larger battery bike. The only proprietary ebike I have is the now discontinued BH gravel X. Unmodified it weighed slightly...

I just put my unused TSDZ2 with the standard 42t 5mm dished chainring on a 20" folder that has 11-34 freewheel. As always the chainline was bad on the largest rear cog but having a 42t 10mm offset narrow-wide aftermarket chainring I replaced the OEM with that instead. The chainline...

The new TSDZ8 is reported to have an improved chainline with a deeper dished chainring. Tongsheng has apparently made several other improvements vs the original TSDZ2 and "B" version (which doesn't appear to me to have any significant advantage over the non-B version). AliExpress for less than...

BH Gravel X that I bought on a whim deeply discounted from bicycle blue book when they were clearing out inventory after BH left the North America Market. It's really a great bike with 2x11 105 drivetrain and Yamaha drive unit. I've ridden it in Oregon, Washington, Utah and Arizona on pavement...

Evening ride up the hill. I know I've posted same location before but here it is again.

I have the G-one 700x40c (70 psi max) on my BH gravel bike (Yamaha PW-SE drive). On the same bike I can only compare them to Continental Doublefighter 700x35c (87 psi max) and Continental Gatorskin 700x32c (100+ psi max). The G-One seems like a decent tire with reasonably good traction on...

I want to do a train and ride this fall but "Amtrak accepts electric bikes and scooters powered by lithium-ion batteries and certified by a nationally recognized testing laboratory". My Yamaha batteries aren't UL certified nor are the batteries for my Qiroll or Tongsheng kits. Ryobi and...

Interesting idea, I should have thought of that when riding through a 2.2 mile long tunnel a couple weeks ago. Different bike but I just now tried my inexpensive rubber strap attach handlebar light on a bike fork leg. It pivots up and down and side to side.

Excellent videos 3dxl. Qiroll needs to do a better job of sealing the drive unit from water/dust ingress, you shouldn't have to do that yourself. IMO USB-C jack would be better than their choice of USB micro. I went for a ~10 mile fairly flat dusty gravel ride with the Qiroll on the front...

Sooner or later someone was bound to try this, so it might as well be me. Seems to work well although on clearly suboptimal tires.

Handlebar extenders like this are inexpensive ($8 for this one) and you can cut down the tube if you find it to be too long. For a little more $ and heavier weight you can get one with an internal battery to charge your phone or GPS in a pinch. Frame bags are nice for carrying lunch or...

The Yamaha is 36v 250w nominal with up to 650w peak (I think). The trail I rode yesterday is mild railroad grade that I rode mostly level 1 or 2 with level 3 (of 4 levels) on a short steeper section because I don't want to stress my knee. I checked the bike display from yesterday's ride which...

Stay safe out there. Looking forward to what you find out about the upcoming Qiroll updated features although I'm not in the market. Have too much stuff already. I finally did part of the John Wayne trail in Washington State. Because of my still bad knee I took my Yamaha powered mid drive...

The battery and controller definitely have to communicate for it to work. A few years ago I built an Arduino board based on a design posted by somebody on a European pedelecs forum but he shortly revised the design and programming several times and I never trusted to use it. So the Yamaha code...

I see that another member posted above that it is a Bosch battery but it looks like my Yamaha battery. Do you know which it is? In the past I couldn't find aftermarket replacement batteries for my BH Gravel X with Yamaha PW-SE motor but now they seem to be widely available including on Amazon...

Early on I bought a spare blue gear (<$10 including shipping st the time). Never had a need to use it though. Had one of the motors apart when converting to coaster brake compatible and the original blue gear still looked new, as did all of the internals. If I ever took it on more than a few...

I have 500w 36v and 750w 48v versions of the TSDZ2, which on paper sounds same as Toseven rather than less powerful (?). Both are good performers but the 750w provides significantly more assistance if/when needed. Neither has run hot for me even with long steep climbs. I live on a mountain...

You're right, 175mm crank arms on that bike. My other bikes have 170mm crank arms which seems to be sort of a default standard. I'm not sure how much difference the extra 5mm makes but it does seem like my knee is bent more on the top of the pedaling stroke with that bike. I might check...