langster gearing

gkerr4

Hi folks - i have a 2007 langster in the much loved 'rust' colour (no laughing at the back - i like it - thats all that matters!)

it currently has standard gearing - which is the sugino 'comp' chainset with a cnc 'zen' 42 tooth chainset with a 16 tooth fixed cog at the back.

ordinarily this would be fine - but i've buggered up my left knee and need arthroscopy on it to repair / remove a torn meniscus (cartilage injury). I've been advised by the consultant that I can continue cycling if it doesn't cause any pain - which so far seems to be ok - with the proviso that I "don't go daft with it.." i have a surgery date of the 10th of July which seems ages away and if I don't cycle I will turn into a fat bloater.

anyway - i've been avoiding the fixed due to the lack of gear changing since I found out about the injury bu I really miss it so I was thinking of lowering the gearing. I'm not sure though on the technicalities

- is the sugino comp a 130BCD chainset or is it a 'proper' track 144BCD?

and also what would be the bet way of lowering it a little - increase the sprocket to an 18 or 19 tooth? - or go to a 40(ish) chainring?

Any help appreciated - even if you just think I should leave the fixed alone for a bit... :-(

thanks
graham

meagain

Well.... running APPROX 71" now. If drop front to 40, down to 67....insignificant so would have to change sprocket as well. Thus surely cheaper/easier to alter the rear half of the equation! 42x20 =s c. 56, 42x22 =s c. 52. One of those should do the trick?

gkerr4

cool - sprocket it is - look for a 20-ish sprocket

right - any good suppliers??

:-)

robbie the roadie

gkerr4 wrote:

- is the sugino comp a 130BCD chainset or is it a 'proper' track 144BCD?

I would have thought it was a 110 BCD? As ever there is a bit on sheldon brown's website about how to measure it to find out.

rdaviesb

The 2007 Langster came with a 130BCD chainset.