Narhay

These are a bit older so this may be the place for them.

I have an XT RD-M737 rear derailleur with worn pulley wheels. The generic plastic (not sealed or ceramic) 6-7-8 speed shimano pulley wheels I got as replacements are too wide for the pulley cage. Which replacements could work? The original pulley wheels seem on it now a bit narrow.

I also have an XT FD-M732 front derailleur with the flimsy metal clamp (looks like a c-clamp but nicer with the middle hollowed out around the circumference). There is a cross shaped (looks like a Chevrolet logo) metal piece that the clamp bolt screws into that tensions the clamp. The bolt that goes into the Chevy logo has broken. Is there a replacement piece anywhere?

Pictures below.

The Golden Boy 

I think it might be best to say "this thread is worthless without pix."

Although I can picture the pulleys, I can't picture the clamp pieces.

Narhay

Yes, yes. I was trying to be clever but I'll get some photos tonight.

The Golden Boy 

Clever, and wizardly with words.

Narhay

This bolt from the clamp is broken. The clamp is also 34.9 which doesn't suit my purposes. Repair, sell on and call it a day?

Narhay

Overview of parts including the chevy symbol. The clamp bolt screws into that and tightens the clamp.

Narhay

Sorry for all the posts. The paste function on my phone is not working as intended.

Used pulley wheels and new ones.

Narhay

Size difference in pulley wheel.

wesmamyke

No help on where to find either part, but that style of Shimano front derailleur is called an "endless band" type. Front mountain derailleurs go cheap on ebay usually, you could probably find a donor for parts.

CycleryNorth81

Replace both deraileurs. Problem solved.

Antieverything

I have AEST alloy pulleys from EBay in my M737, I took them out of a 5700 RD when I made the switch.

Narhay

Thank you for the endless clamp info. Makes it easier to find a replacement if I go that route.

I can can buy new dérailleurs but I'd rather try and fix these first.

So the 5700 rear dérailleur looks to be 8-9-10 speed meaning the 6-7-8 pulleys just may be too wide.

Antieverything

That could well be, I also have the same pulleys in a Arabesque RD, a 7700, and a Campy NR. If I remember correctly you have to take the center sleeve out for older pulleys because those have a larger diameter bolt, also since they are alloy you don't need those side cups.

Narhay

I won an auction for a pair of aest alloy pulleys so that has sorted that for now.

The endless band clamp bolt is the next question. I looked around but couldn't find a suitable replacement.