Parts for Lightweight rear hub?

[clanger9]

Well, if it means getting sensible gearing for my bike, then count me in!

I know the club have had trouble in the past with people not buying parts after they're made. Would it be possible to do it "KickStarter"-style, where we pay up front and either get the parts (if enough people pay and they get made) or our money returned (if they don't)? I don't know if this would work, it's just an idea...

Out of interest, does anyone know what the "correct" tooth count is for the CSR? I believe the Russell Motors one is 56 teeth, though they haven't confirmed yet whether or not they actually have any...

[Ozmadman]

Out of interest, does anyone know what the "correct" tooth count is for the CSR? I believe the Russell Motors one is 56 teeth, though they haven't confirmed yet whether or not they actually have any...

I think yours is a 54 tooth, the 350 G5/model 8 is a 55 tooth so a 56 tooth would lower the gearing even further. You can play around with the size of the gearbox output sprocket as I have done with my 350. I now have a 20 tooth gearbox sprocket with a standard 55 tooth rear sprocket and that is just about right now. Putting a 56 tooth rear sprocket on your bike from a 54 and with a 17 tooth (standard) gearbox sprocket would be too low in my opinion. Look at the ratios I have worked out below

54/17 = 3.176:1 (standard ratio)
56/17 = 3.294:1
56/18 = 3.111:1
56/19 = 2.947:1
56/20 = 2.800:1

mine is 55/20 = 2.750:1 whereas previously it was 55/18 = 3.055:1 which I found was too low. The gear ratios within the boxes are all the same. Also bear in mind that the Russell Motors price list is about 8 years out of date so get a price before you order as some of the stuff could be double or triple what it lists in their catalogue

Paul

[clanger9]

Excellent, thanks Paul. That's what I needed to know.

I have a new 18 tooth gearbox sprocket, so based on your information I should be able to come up with a good final drive ratio.

[Ozmadman]

Excellent, thanks Paul. That's what I needed to know.
I have a new 18 tooth gearbox sprocket, so based on your information I should be able to come up with a good final drive ratio.

No worries, I just found that the standard ratios on my model 8, particularly 1st gear were too low for my liking making 1st gear almost a waste of time and cruising at say 50 mph giving quite high revs. Just depends what you are using your bike for and what your weight is.. I am only 10 stone and a bit and I like to ride along at 50-60mph which I can do now pretty comfortably (engine wise!) but if you have a lot of hills, are heavy or you plod around town then the standard gearing would be fine. With my set up anything under 30 mph requires a change down to 3rd