V brake adaptor for 24" wheel to 26" fork

othello

My son has a Specialized FSR 24" wheel bike, which he loves. I've been gradually replacing parts to save some weight, as it is a little heavy.

I want to replace the fork, as it is a bit heavy, but more importantly it is not that adjustable. Looking on the MTBR forums, a lot of people have dropped in a short travel SID on bikes like these. The fork height is pretty similar and the weight is good, and I can pick up an old model off eBay cheaply.

But I'm using v brakes and the bosses on the fork wouldn't work with the 24" tyre. So I'm looking for a brake boss adaptor that I can fit to the fork (designed for 26" wheels) which will reposition the bosses for 24" wheels). A few people on MTBR have had custom ones machined, and some have said such an adaptor is available. But I cannot find anything.

Has anyone any ideas? The alternative is to go with disks (I have a spare set of Magura disks in the spares box), but then I need a new front wheel, which presents problems. Lightweight 24" wheels are super rare.

Any help/advice would be gratefully received!

nicklouse

you may be able to modify an Identiti rear bolt on V brake bracket.

have fun.

Chunkers1980

Yeah, I'd get him a full size bike, much easier

othello

Chunkers1980 wrote:

Yeah, I'd get him a full size bike, much easier

Unfortunately a full sized bike, even an XXS frame is too big as he is only 7.

othello

Basically I need something like this http://www.sjscycles.co.uk/mavic-calipe ... prod12065/ but in reverse 26 > 24.

nicklouse

have you thought about fitting a 26" wheel and see how he gets on with that? cant think what the angles are on that bike so not sure how it will feel.

as a bracket is not available of the shelf. so modding the Identiti one (or one similar) or getting a 24" disc wheel are the other options.... and as kids do grow

Chunkers1980

It's gonna be quite a lot.

2.5 cm in the wheel, and about the same in the fork, depending on what you do to the travel.

It's a kids bike so will have relatively short wheel base which will exaggerate everything.

nicklouse

and some of that can be adjusted with tyre choice. dont forget 24" and 26" are just nominal figures.

othello

Going for a disc wheel is an option. I guess I could get it laced onto the existing 24" rim, and would just need to buy a cheap disc hub.

Or I could get the Mavic brake bridge and try and redrill it.

Chunkers1980

20" thought the rim was a 24.

Sounds like a lot of effort, stop being a pushy dad, let him ride and get him a full size bike as soon as you can. He's only 7, he should be doing kids stuff like skids and alike.

othello

Chunkers1980 wrote:

20" thought the rim was a 24.

Sounds like a lot of effort, stop being a pushy dad, let him ride and get him a full size bike as soon as you can. He's only 7, he should be doing kids stuff like skids and alike.

My fault, I meant 24" (have edited post)

I'm not being a pushy Dad here. Cycling of any type is something he, and his little sister really enjoy. They are both members of a track cycling club where they ride every week, and happily want to go and ride more at the weekends. I asked my son what he wanted to do over Easter. First thing he said 'Can we go to Swinley Forest for a ride?'.

On the kit front, I want them to enjoy their cycling as much as possible, and would rather spend my bike budget giving them a bike that doesn't stop that enjoyment. I'm not spending £££s here -- all the kit purchases have been off eBay (including the FSR).

I would rather spend my money on them having nice bikes than on games consoles