Do I need a longer Bottom bracket?

[d8mok]

I’d say arms are too close too. Only would take any flex , mud or bolt to come slightly loose and it’s a chunk out of chainstay.

 

[MR OX]

I'd say that's a bit to close for comfort, it looks pretty tight before you even consider it'll be a tighter gap once you've fitted the chain.

 

[mtbdave]

I’d say arms are too close too. Only would take any flex , mud or bolt to come slightly loose and it’s a chunk out of chainstay.

Yeah that I don’t want the frame is spotless

 

[d8mok]

What width is it currently?

 

[mtbdave]

What width is it currently?

That I don’t know, I don’t have the tools to remove it, the b/b was in from the original owner

 

[d8mok]

That I don’t know, I don’t have the tools to remove it, the b/b was in from the original owner

Please tell me it’s been out before ? As you may be about to enter a world of pain. Fingers crossed not.

 

[2manyoranges]

GT Dave - OK you need to measure things to know how much you need by way of clearance - 3-5mm is about right in terms of the crank arm to chain stay clearance. Then you need one of these:

Cyclo Shimano Bike Bottom Bracket Cartridge Cycle BB Tool | eBay

Find many great new & used options and get the best deals for Cyclo Shimano Bike Bottom Bracket Cartridge Cycle BB Tool at the best online prices at eBay! Free delivery for many products.

www.ebay.co.uk

And a big adjustable spanner to go on it. Then know that the RH side cup is reverse thread - i.e. turn clockwise to undo, while non-drive LH is normal - anticlockwise to undo....

Then you need to make sure that you know whether the BB shell is 68 or 73 wide - which you can tell be measuring it. Then go for a longer axle bb - just ask on here and I am sure people will come up with one....

 

[mtbdave]

Please tell me it’s been out before ? As you may be about to enter a world of pain. Fingers crossed not.

The guy rode it for a year then he had it on his mantlepiece so I would guess it’s not been out

 

[mtbdave]

GT Dave - OK you need to measure things to know how much you need by way of clearance - 3-5mm is about right in terms of the crank arm to chain stay clearance. Then you need one of these:

Cyclo Shimano Bike Bottom Bracket Cartridge Cycle BB Tool | eBay

Find many great new & used options and get the best deals for Cyclo Shimano Bike Bottom Bracket Cartridge Cycle BB Tool at the best online prices at eBay! Free delivery for many products.

www.ebay.co.uk

And a big adjustable spanner to go on it. Then know that the RH side cup is reverse thread - i.e. turn clockwise to undo, while non-drive LH is normal - anticlockwise to undo....

Then you need to make sure that you know whether the BB shell is 68 or 73 wide - which you can tell be measuring it. Then go for a longer axle bb - just ask on here and I am sure people will come up with one....

Thanks that’s really helpful

 

[FluffyChicken]

Yeah, take the crank arm back off and measure it, but you need mm's, so callipers will reach over otherwise improvise with a desk and block of wood (or a clamp/vice to get the outer width and measure the gap in them).*

As drive side is fine, the next size up should be good to push the none drive side out.

*If it is Shimano, the number will also be written on the axle near the cup.