Replacing the crankset?

[Too Late]

Hi all

I am looking to get a second have bike as have seen one for sale but it needs a new crankset.

How much is a new crankset?
How do I know which set to buy?
Can I fit them or will it need a specialist?


Also the rockshock forks haven't been serviced for a long time..5+. Is that a concern and should they also be serviced?

Thanks
Nick

[Get Karter]

Which crankset? First of all, it depends on what bottom bracket you have.

[Too Late]

The bike is a GT avalanche

Thanks nick.

[Too Late]

Reading an old post. Someone has suggested this
Shimano Deore HT2

[Benmac]

HT2 = Hollowtech 2 which is Shimano's bottom bracket and chainset standard.

Why do you think the chainset needs to be replaced? Is it actually just the bottom bracket (the bearings it all turns on). If so, that'll be cheaper to swap out (parts about £15) than a chainset. If the chainset is goosed then it's probably just the chainrings which can most likely be replaced (although it might be cheaper to just get a bargain new chainset)

Either way you will need specialist tools. Very easy to do mechanically but not really feasible without the right tools.

[bugeyewrx]

If it's a 9spd triple you need, 9 cogs on the back and 3 on the front, then it's one of these should do it.

crankset


The tool you need to fit it is one of these.

tool

What you need to remove the existing crankset depends on what sort it is.

You may need to adjust the front derailer or you might be lucky and not.

Youtube for various videos on how to fit the crankset and adjust the gears if needed.


Only other things to check are that the gear ratios on the new match the existing one otherwise a new chain may be needed but tbh you should fit a new chain anyway.
You'll need a chain tool to adjust the length of the new chain.

[Adrian E]

Depends how knackered the rest of the running gear is and what your intended use is?

I recently junked an entire worn out 3x9 drivetrain on the basis of it needing - a new bottom bracket, 2 out of 3 chainrings, a chain, cassette, and a rear mech. Was MUCH cheaper buying a complete replacement groupset as per the link above, but you need to decide your use to figure out whether to go for a like-for-like replacement or something else.

Mine's used for commuting so I went for a 1x11 XT set, but if using it offroad I'd got 2x10.

3x9 is now considered old hat (I use it on my hardtail offroad bike still) and prices for parts are getting more expensive as a result, so if it's a keeper I'd move to a newer groupset.

Forks can be serviced, but depends on the state of the headset and forks as to whether it's worth it.

My drivetrain upgrade has probably cost me £400, but I need a new headset and probably a new fork so got another £200 or so to blow yet.

Reason for all the detail is if you're looking at this as a cheaper option than a new bike, it may not be. Especially if you don't have the tools. Only thing I needed to buy was a Hollowtech II bottom bracket tool (£25 for torque wrench use!) and the tensioner for the non driveside crank arm (about £3)