This is my first post in this thread of the new year, I think! I spent most of January with a bad back, but cycling once more and I've got a new problem... But first, I had to catch up in the thread, and along the way I found some great contributions here (!!) - and this is one of the key reasons I bought a TSDZ2, was because this thread exists!
I'm in particular appreciative of Speady's image and directions for disassembly of the crankset. And, for the links to new CSK30P bearings - from Speady and also Buk - thanks!
Meanwhile, I noticed Grisha's post that included these quotes:
extrasilver wrote: ↑
Jul 27 2017 5:17am
extrasilver wrote:i will be ordering a 52 & 48t on friday
[I THINK THIS WAS ME WHO SAID:] There's not a lot of difference there. I'm running both the stock 42T and 52T and, given my rear gears, I hardly need the two. Even with the steepest hills I've had to do so far, the 52T with 28T has been low enough, and 52T with 13T (it won't stay in the 11 - going to try and change the chain out today) gets me up to over 25MPH....
as im running a single speed bike every tooth counts! right now with the stock 16/42t gearing the acceleration and hill climbing is really good but im aiming for a higher top speed and for the gearing to have longer legs.. right now it takes about 2-3 seconds to hit 35kph then myself and the motor hit our max cadence ( without looking like a wolly anway )
just to give a rough idea, if you use your bike with the gearing set to 16 & 52t how does it perform from 0 > top speed and what is the top speed you can reach? i understand there are a few a variables to play here but just so i have a very rough idea
I appreciate Grisha's remarks because I don't know much about single-speed frames / setups. But certainly, the dished chainring is very helpful, on any TSDZ2 equipped bike. And, Grisha's right about the lack of dished chainrings AND that the vendors cited are selling flats - if anyone finds a source for dished ones, please tell us! I DO NOTE, however, that we can now get different spiders that can accommodate different BCD specifications, so maybe with one of these other sizes there are dished chainrings out there? IDK, but if anyone does, I think this community would like to know about it.
And now, on to what I came here to ask about; two things, a noise and a request for more info on upping the cadence.
...As a brief refresher, I have two TSDZ2 setups, "48V 15A 500W", and "48V 18A 750W". The second of the two, the 750, started out noisy, but after about, oh, 40 to 50 miles in it became a LOT quieter and is now essentially silent . . . excepting for a new noise that started about, oh, 7 miles back or so. It's a thunking noise and it comes with a feel in the pedal (heck, the whole bike vibrates some), and it's only there when power is being applied. I don't recall if I've tried just pedalling with the system off. Hmmm. Anyway, it's a brief event once or twice per pedal revolution, thunk -pause- thunk - pause, etc.
I'm guessing the thunking is caused by a problem with the infamous blue gear? If so, it's puzzling because I have taken so good care of that gear! I never start out in assist mode higher than eco, and only bump up the power as speed increases, never in fast or turbo below 10 MPH, never ever! Further, I tend not to launch with a lot of torque, either. ... Could someone confirm, please: It's the blue gear, right?
And, as for the cadence thing: Like many of you, I'm not happy with the current cadence limit cut-out of about 90. I am not excited about going to 52V since I have a bit of investment in 48V, so I had read with curiosity that someone was going to try the 36v motor at 48v to bump the cadence. Should work! ... I was thinking I'd maybe get the highest Amp rated 36v motor and try installing it and see what happens. And here I mean literally get JUST the motor, and swap it out with one of my existing 48v motors, leaving everything
else alone. Before I bother, does anyone have any comments about this?