Question on gears....

...from a complete bike ignoramus.

9 messages
TW
04/09/2006 at 13:12
If I want to change the gearing on my bike so that i have more low gears (the ones for going up hill!)..how do I do it?

Can I just change the smaller front ring, to an even smaller one? or do I need a whole new set of ones for the back?

For background, I have a PX chrono which is fantastic for the flatter and quicker routes, but I want to be able to spin my legs a little better on climbs.

Any advice is greatly appreciated..or do I just go to my LBS and ask this same question?

Cheers

TW
TW
04/09/2006 at 13:18
It is not actually "more" gears I want, I just want to expand the range so my lower gears are lower (or whatever the correct term is).

TW
04/09/2006 at 13:22
The quick answer is either a smaller ring on the front or a bigger one on the back. However, your mechs may limit you on how small/big you can go. I suggest you have a word with the boys at PX and find out what they recommend.
JD.    pirate
04/09/2006 at 13:27
TW - you could fit a compact chainset to the bike. gumps did that on his planet x TT bike. that gave him plenty of gears to spin. or you could stick a 14-28 cassette on the back. but that would only give you one more lower gear.
JD.
TW
04/09/2006 at 13:31
How does a compact differ from an ordinary one?

Cheers
JD.    pirate
04/09/2006 at 13:49
compact chainsets are smaller. so, at the moment you probably have a the standard road set up with a 53 & a 39 chainring. but on a compact the gears are more like 50 and 35 or something like that. so you get a load of lower gears but lose some of your top gears. you'll need to change your front shifter as well i reckon. maybe a few other things too.
JD.
TW
04/09/2006 at 14:06
OK..that makes sense...Also been on to PX about what they recommend changing. Currently have a Truvativ Elita XL GXP on the front, which from looking around t'internet seems to be a 39-48 (Is this just the number of teeth on the ring?)..so maybe a compact with a bigger range would do the job.

Cheers

TW

TW
04/09/2006 at 14:10
It is a 53-39 rather than a 48-39.

TW
JD.    pirate
04/09/2006 at 14:16
yeah, those numbers, 53, 39 etc refer to the number of teeth on the chainring.
JD.

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