Enoch Powell

Hi

I need a new bottom bracket for my mountain bike.
I have removed the old one which has written on it: PowerPro BB-7120, BC1.27x 24T L <68> R

I would like to replace it with this: Shimano XT-SLX BB70 Hollowtech II Bottom Bracket | Chain Reaction Cycles
Then I can fit a better chainset to it.
Is this possible?

Any help / guidance greatly appreciated!

cpach

By a chainset I assume you mean crankset? If that is the case, then yes, that bottom bracket is compatible with the bottom bracket shell in your frame. They are both british/ISO threaded for a 68mm width shell

SkyDog75

"Chainset" and "crankset" are interchangeable terms. It just depends on which side of the Atlantic you're on.

As for a new bottom bracket, it's standard practice to choose your new crankset, then buy the appropriate bottom bracket to mate that crankset to your frame. The numbers on your old bottom bracket indicate it's British-threaded and 68 mm wide. That's the most common standard by far, so you should have no problem finding a crankset and bottom bracket to fit.

Bill Kapaun

+1
Buying the BB first is like buying a wheel and then finding a bike it fits.

Enoch Powell

Sorry I meant crankset. I want to fit something like this: Shimano Deore M590 9 Speed Triple Chainset | Chain Reaction Cycles however I have no idea which boltcircle, length or teeth I should go for.

I also need a derailleur to go with it, I was thinking something like this: Shimano XT M786 Shadow+ 10 Speed Rear Mech | Chain Reaction Cycles

The read wheel has a nine speed cassette on right now but I can get one with ten on if need be.
I'll need a new chain too if anyone has any suggestions

trailangel

Chainset is a perfectly acceptable term to use.

alcjphil

If you buy that rear derailleur, you will have to make sure that your shifters are 10 speed.That derailleur will not work with anything other than a 10 speed shifter. You cannot change the cassette to 10 speed without changing the shifter

Enoch Powell

Ok thanks, I'll add a shifter to the list.

alcjphil

You can't change only one shifter
Start pricing all this out. Make sure that your bike is worth the cost of upgrading all these components
At this point you are looking at crankset, derailleurs, shifters, chain, and cassette.
Make sure that your bike is good enough to warrant all these upgrades

Enoch Powell

I don't know what bike it is. I bought it off a local Facebook 'for sale' page. It's all been sprayed black but it seems quite light

mulp

I'm thinking the Whole Earth Access to Tools advice applies here: buy what you need, not what you want to need.