Groupset for CX/winter bike with disc brakes

bad_ash
bad_ash Posts: 47
edited August 2014 in Road buying advice
I'm thinking of building up my own CX bike for winter use. If I buy a standard groupset such as 105, would the shifters be compatible with mechanical disc brakes like BB7s? I keep hearing about pull ratios so just wanted to check they would work.

And looking at the BB7s I see they come in 3 different sizes (160mm, 18/0mm & 200mm), do road bike generally take one size or is it frame dependent?

Comments

  • ugo.santalucia
    ugo.santalucia Posts: 28,312
    You need the ROAD BB7, not the MTB ones...

    Those will be compatible with any brake lever
    left the forum March 2023
  • bad_ash
    bad_ash Posts: 47
    Great, thanks.

    I might be asking for wheel advice next! :)
  • ugo.santalucia
    ugo.santalucia Posts: 28,312
    Be careful though... you might get the usual... :wink:

    Actually that's not true, as Aileron has finally arrived in the UK!
    left the forum March 2023
  • Monty Dog
    Monty Dog Posts: 20,614
    Look at TRP HyRds or Spyre disc brakes if using cable brakes - BB7s are badly in need of an update, they work fine (I have 2 bikes running them) unless you go for the Shimano or SRAM groupsets with hydro brakes
    Make mine an Italian, with Campagnolo on the side..
  • rafletcher
    rafletcher Posts: 1,235
    Monty Dog wrote:
    Look at TRP HyRds or Spyre disc brakes if using cable brakes - BB7s are badly in need of an update, they work fine (I have 2 bikes running them) unless you go for the Shimano or SRAM groupsets with hydro brakes

    As above. I have the TRP Hy/Rd brakes, Excellent, benefits of hydraulic brakes (self-centreing pads, progressive braking) with the ease and cheapness of cable discs (if you don't know the Hy/Rd have the hydraulic reservoir in the caliper, and use cable to actuate them). Oh, and they are less bulky than the BB7's (which I had before) so fitting 'guards is much easier. Front needed a 10mm spacer between fork dropout and stay, the rear just a little light bending of the stays.
  • luv2ride
    luv2ride Posts: 2,367
    Happy TRP Spyre user here. Similar benefits to the HyRd system, can adjust pads either side of the disk. Also using SRAM Rival groupset (with a Rival Cross 46/36 chainset) which I love. However, if spec'ing a bike now I'd be looking at the new Rival hydro brake gruppo. Looks tasty. 8)
    Titus Silk Road Ti rigid 29er - Scott Solace 10 disc - Kinesis Crosslight Pro6 disc - Scott CR1 SL - Pinnacle Arkose X 650b - Pinnacle Arkose singlespeed - Specialized Singlecross...& an Ernie Ball Musicman Stingray 4 string...
  • cycleclinic
    cycleclinic Posts: 6,865
    And for hubs Shimano XT on a budget, Shimano XTR. Shimano CX-75 (these I like a lot) Novatec D711/D712 (they have other models too), DT Swiss 350, Hope.....

    Otherwise it has all been said. I too would go with the tektro options. Not tried Shimano CX-75 calipers but these again have a fixed pad, the tektro spyre has two moving pads, a big plus.
    http://www.thecycleclinic.co.uk -wheel building and other stuff.
  • thecm
    thecm Posts: 71
    If it's a new groupset as well, what about the new 105 11 speed and the hydraulic brakes? Will be more costly but significantly better braking
  • cycleclinic
    cycleclinic Posts: 6,865
    The RS685 STIs won't be available til the end of October/November. I have had them on order with Madison since February.
    http://www.thecycleclinic.co.uk -wheel building and other stuff.
  • bad_ash
    bad_ash Posts: 47
    I had a look at the Rival options, I hadn't realised they now had 11 speed or hydraulic, the hydraulic disc version looked to be about twice as much as the rim brakes, £800 compared to £400. The TRP Hy/Rd brakes sound like an interesting compromise. Thanks for the advice.
  • thecm
    thecm Posts: 71
    thecycleclinic wrote:
    The RS685 STIs won't be available til the end of October/November. I have had them on order with Madison since February.
    I thought they were only due for release in August? At least that's what the BR test stated?

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