Bought XTR Brakes for Trek 7500, bolt too small!

clearz

This is a follow up on my Thread titled
Disc Brakes on a Trek 7500 Hybrid?
http://www.boards.ie/vbulletin/showthread.php?p=67827999&utm_source=notification&utm_medium=email&utm_campaign=notify#post67827999

I decided not to go with disc brakes as it would be cheaper to just go for a new bike than to try and get all that would be needed to convert my bike to one suitable for discs. Instead I went for a front and back set of Shimano XTR V-Brakes

http://www.evanscycles.com/products/shimano/xtr-m970-v-brake-ec008081
So I brought them to halfords to get them to put them on for me and next thing I am being told that the screw size is different. I'm pissed off now after spending so much on these brakes only for my bike not to fit them. I thought all these would be standard. Is there anything I can get to make them fit. I have attached photos below so you can see the different bolt sizes.




















Can anyone recommend a solution to get these brakes to fit or will I just have to send them back.

CheGuedara

Looks like you screwed out the canti mounts while unbolting the old brakes - no biggie

Use a small spanner to get them off the back of the old brake arms and screw them back into the frame (probably worth putting a bit of thread lock or plumbers tape on em, might help to keep it in there next time) and then bolt on your XTR stoppers

....different bolt sizes, what a load of b****cks...

CheGuedara

Failing getting the canti mounts off the back of the old brakes (shouldn't be difficult though) I that I *think* I might have some canti mounts floating around in a tool box I could send your way, couldn't guarantee they'd fit though as they came off a front fork.

If it comes to it you're welcome to try em though

Morgan

CheGuedara wrote: »

Looks like you screwed out the canti mounts while unbolting the old brakes - no biggie

Use a small spanner to get them off the back of the old brake arms and screw them back into the frame (probably worth putting a bit of thread lock or plumbers tape on em, might help to keep it in there next time) and then bolt on your XTR stoppers

+1

seamus

Jaysus, that's a rookie one, remind me never to ask for advice from Halfords.

As CheGuadara says, it looks like the mount has become unscrewed from the frame, which is no big deal.

The V-Brakes actually sit on a mount on the frame, they don't screw into the frame at all. The bolt that comes with the V-brake just keeps the brake in place so it doesn't slide off the mount.

Fado, fado almost all mounts (known as "bosses") were welded to the frame. This was fine until you crashed your bike and broke the boss off, or some genius managed to thread the boss meaning that you couldn't secure your brake to it. If this happened, you'd need a specialist workshop to cut off the old boss and mount a new one. Not cheap.

Then they decided that changing the bosses so that could be screwed in and out of the frame would make people's lives easier, and it also means that you can remove them when you install Discs to your bike and save yourself from some nasty holes in your body when you crash.

This is what's happened here - the (old) V-Brake has been slotted onto the boss and screwed on, but when attempting to remove the v-brake, the halford's knob has screwed the entire boss off the frame instead of just the retaining bolt.

If you're not comfortable doing what CheGuadara suggest (though it's dead easy), then any semi-competent monkey bike shop can sort this for you.

clearz

Jaysus lads thats great news I thought I had wasted my money. God they really are idiots in Halfords. My Cousin got his bike serviced in the same place a few months back and on the way home the wheel came of his bike and he broke his arm (gonna be big bucks there) Then I heard the exact same thing happened to another person and it was the same guy who fixed his bike also.

clearz

@Che
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