New chainset

[john_p]

I have a 42/34/24 chainset on my MTB and I do a mix of road, bridle and cycle paths. I never use the bottom gear and seem to spend all my time in top wishing I could go a bit faster.

Can I swap this easily for a chainset that's 48/38/28? Will it make any difference - or can I swap the individual rings?

I assume I'll need a new chain, but the derailleur (rear) should be happy since the difference is the same?

[neil_bolton]

john_p said:

I have a 42/34/24 chainset on my MTB and I do a mix of road, bridle and cycle paths. I never use the bottom gear and seem to spend all my time in top wishing I could go a bit faster.

Can I swap this easily for a chainset that's 48/38/28? Will it make any difference - or can I swap the individual rings?

I assume I'll need a new chain, but the derailleur (rear) should be happy since the difference is the same?

48 may well be too big.

What chainset is it? you may get the abililty to change your outer chainring.

Additionally, a change of the cassette/freewheel at the rear, to an 11t rather, I suspect, than a 12t will make a big difference. Its also cheaper, gives a better general spread of gearing and most likely will be easier to change (change your chain as well at the same time - just trust us on this).

Put it this way, I never use my 44/11 combo unless ragging it downhill...

Edited by neil_bolton on Thursday 8th May 08:41

[pdV6]

Would a 48T give problems with standard MTB front mechs? To go that large you might need to invest in a road mech.

Having said that, a 44T will give a bit of extra length in your gears and as Neil mentions, if your cassette has a 12T top gear then an 11T would also help you out.

I very very rarely use 44/11 off-road but do very occasionally spin out 44/11 on the bike I use for commuting (with fat 26" slicks).

[john_p]

I just checked and my lowest (highest?) gear on the back is 14T !

What with that and my second bent rear axle it's looking like I need new wheel.. axle.. er might as well replace rear sprockets, chain, front chainring looking a bit worn, new sealed crank.. you get the idea

[pdV6]

john_p said:

I just checked and my lowest (highest?) gear on the back is 14T !

That'll be it then!