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 Post subject: V brakes too short!
PostPosted: Mon Mar 18, 2013 9:49 am 
retrobike rider
retrobike rider
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Joined: Tue Mar 31, 2009 2:03 pm
Posts: 699
Location: Lincoln
So I have a question for you chaps with more experience than me.

I built this for my daughter:

Image

It's based on a '92 timberline frame (see this thread: viewtopic.php?f=1&t=159394 )

When I built it up, I had to pinch a set of V's for the rear off her old small bike, they didn't fit very well but got it going.

I picked up a nice full set for it and fitted them over the weekend, but the rear blocks will only half cover the rim when set at their highest position.

The bosses have been moved at sometime in the past as it would originally of had a U brake. Is it just a case of the bosses are in the wrong position? or should it have a different type of brake fitted?

I'm thinking about some sort of adapter plate to lift the position of the bosses (need to go up 2 - 3cm) does such a thing exist?

I can't upload a picture as I've managed to loose my camera lead :facepalm:


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 Post subject: Re: V brakes too short!
PostPosted: Mon Mar 18, 2013 11:04 am 
MacRetro rider
MacRetro rider

Joined: Fri Feb 09, 2007 4:16 pm
Posts: 8658
An adaptor plate exists from Mavic that moves the bosses up for putting a 700c wheel in a 26er mtb but not sure it would work there.
Alternatively get a U-brake plate and U-brake bolted through the seatstay bridge.
Alternatively again get a A-Z disc brake adaptor plate and convert to disc brakes.


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 Post subject: Re: V brakes too short!
PostPosted: Mon Mar 18, 2013 12:21 pm 
Retro Guru
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Joined: Mon Mar 28, 2011 9:29 pm
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Location: Somerset
it's a very small frame, perhaps the bosses were moved to suit a 24" wheel, this would match the 2-3cm precisely.


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 Post subject: Re: V brakes too short!
PostPosted: Mon Mar 18, 2013 2:34 pm 
retrobike rider
retrobike rider
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Location: Lincoln
That's certainly a possibility that I had thought of too.

With regard to fixing this, I've found these on the Bay:

http://www.ebay.co.uk/itm/390559954032? ... 1423.l2649

Image

But I expect they'll end up as silly money by the end of the auction. Does anyone else make something similar?

If it comes to it, I can leave then as they are, because the bike will do ridiculously low mileage anyway, and it's the rear brake as well so less use than the front.


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 Post subject: Re: V brakes too short!
PostPosted: Mon Mar 18, 2013 9:47 pm 
Lincs, East and South Yorks Deputy AEC
Lincs, East and South Yorks Deputy AEC
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Joined: Fri Feb 29, 2008 11:55 pm
Posts: 5361
Location: GUNNESS NTH LINCS
there is some blue bin ones up currently for £25, but incomplete.....nowt a mish mash wouldnt fix :D

http://www.ebay.co.uk/itm/Trick-Paul-Co ... 4d0a74b1e1

hope this helps buddy :D


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 Post subject: Re: V brakes too short!
PostPosted: Mon Mar 18, 2013 9:56 pm 
Retro Guru

Joined: Sun Jul 19, 2009 7:14 pm
Posts: 619
Location: Staffordshire
If this was a 92 then it would of had a u brake fitted but I think it's newer as the gear cable bosses sit higher than my first 92 talera which were kind of the same bike .

Have you checked to see if the brake on the back is a front brake ? I have seen brakes forsale on here stating frot and rear , or try changing them over ?


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 Post subject: Re: V brakes too short!
PostPosted: Mon Mar 18, 2013 10:21 pm 
retrobike rider / Gold Trader
retrobike rider / Gold Trader
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Location: Birmingham
WHY NOT JUST USE A U BRAKE, oops nowt else is going to work

and yes the u brake studs are in a different position

front and rear usually is just the direction of the pads, some brakes e.g pederson cantis are front and rear specific. u brakes usually go on the back.

you can get some funky bmx u brake cheap as chips


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 Post subject: Re: V brakes too short!
PostPosted: Mon Mar 18, 2013 10:33 pm 
retrobike rider
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Location: Yorkshire, England
Charlieboy28 wrote:
WHY NOT JUST USE A U BRAKE, oops nowt else is going to work

and yes the u brake studs are in a different position

front and rear usually is just the direction of the pads, some brakes e.g pederson cantis are front and rear specific. u brakes usually go on the back.

you can get some funky bmx u brake cheap as chips


Because the studs are not in the correct position for a U-Brake ;)


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 Post subject: Re: V brakes too short!
PostPosted: Mon Mar 18, 2013 10:38 pm 
retrobike rider / Gold Trader
retrobike rider / Gold Trader
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Joined: Sat Jun 20, 2009 3:45 pm
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Location: Birmingham
FluffyChicken wrote:
Charlieboy28 wrote:
WHY NOT JUST USE A U BRAKE, oops nowt else is going to work

and yes the u brake studs are in a different position

front and rear usually is just the direction of the pads, some brakes e.g pederson cantis are front and rear specific. u brakes usually go on the back.

you can get some funky bmx u brake cheap as chips


Because the studs are not in the correct position for a U-Brake ;)



good point :facepalm:


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 Post subject: Re: V brakes too short!
PostPosted: Tue Mar 19, 2013 12:05 pm 
Old School Grand Master
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Joined: Sun Aug 21, 2011 11:57 pm
Posts: 4074
Location: Antwerp, Belgium
Looks like they're moved for a 24" rear wheel indeed. Perhaps you could just get a 24" wheel and turn the bike into a 46-er ?


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