advice on 700 disc wheels and brakes

jonomc4

OK having been caught out by this sh1t winter one last time yesterday and then spending as long drying out my bike as I spent riding it I want to get my commuter bike back up and running. But I am going to change the wheels and brakes so it is good for the whole winter.

What I am going to do is change the wheels for disc wheels and I want to buy a good (not the best) set of disc brakes. The bike currently has a Rival groupset on it - so obviously I want something that is compatible with this.

I (as can be seen above) have no idea about this sort of thing! I am guessing I need cable pull disc brakes. I don't want heavy wheels though - I would want a set at around 1,600.

Any clues and hints?

nicklouse

first off is your frame and fork disc ready?

what is it?

jonomc4

OMG - I have no idea. The never even occurred to me! I thought you could fit them to any frame

The frame of the bike I want to convert is a specialised Sirrus Expert 2012. Am I scuppered before I even start? I have since I had it changed the groupset to the Rival after the accident and changed it to drop handlebars.

ugo.santalucia

If your bike does not have disc brakes, chances are, it is because the frame is not designed to take them. If in doubt, post a few photos of the front fork and rear of the frame and we can tell you

jonomc4

not the best images - but what I could find on the net

nicklouse

sorry not happening. the rear hub sapacing is 130 not the required 135OLD. but you could change the fork and fit a front disc....
Avid Road BB7

apreading

Sorry - no can do...

The fork needs two bold mounting points near the bottom of the left leg and this has none. More importantly, the frame needs the mounting points near the QR lever on either the left seatstay or the left chainstay.

This has none of the above.

I am interested in the advice on the question though - I have a boardman hybrid and thinking about new wheels - dont want to spend a fortune but would I be able to get better than the Ritchey OCR wheelset that came on the bike? Even if I cant get something better, then could I get something similar for when a wheel inevitably needs replacing? Doesnt seem easy to find 700c disc wheelsets and advice on them - do I need to get a wheelbuilder to but 700c rims on an MTB disc hub?

jonomc4

Depression

Nah - I will just have to keep the current brakes. It would be cheaper for me to go buy a 2nd hand boardman CX than all the changes I have made to this bike.

Trouble is I am spoilt with an expensive best bike that is such a great ride that I am getting reluctant to use the commuter. Guess I will just switch back to the idea of putting the Mavic Kysirium equipes on it and force myself to use it more.

Thanks for the help - and stopping me from wasting money on something that wont work.

nicklouse

apreading wrote:

Sorry - no can do...

The fork needs two bold mounting points near the bottom of the left leg and this has none. More importantly, the frame needs the mounting points near the QR lever on either the left seatstay or the left chainstay.

This has none of the above.

I am interested in the advice on the question though - I have a boardman hybrid and thinking about new wheels - dont want to spend a fortune but would I be able to get better than the Ritchey OCR wheelset that came on the bike? Even if I cant get something better, then could I get something similar for when a wheel inevitably needs replacing? Doesnt seem easy to find 700c disc wheelsets and advice on them - do I need to get a wheelbuilder to but 700c rims on an MTB disc hub?

more and more MTB 29ers coming out the wheels are the same size despite the name. BUT the hub spacing for the rear is the MTB standard 135mm while road non disc hubs are 130mm and it does not look like there will be a road spec 130mm disc hub.

getting a hand build is the easyest way.

Monty Dog

FWIW most braking effort goes through the front wheel, so swapping your forks to take a disc is worth considering, but you'll also need a new front disc hub. As said, rear disc hubs have standardised on MTB sizes, so will not fit a frame designed for a 130mm road hub. As you frame appears to have carbon rear stays, I wouldn't contemplate one of the bolt-on disc converters either.