Disc brakes on a commuter with 25x700c tyres. Good idea/bad idea?
The standard answer is that V-brakes are more than enough for skinny tyres because there isn’t as much rubber on the road for discs to make any difference – ie you can lock up skinny tyres using vs no problem.
I, however, have discs on my commuter (Spesh Sirrus) and much prefer them to vs as they are more dependable in the wet and I am a fat barsteward so have more weight to slow down.
I’ve never had a problem with modulation, but:
a) I am a fat barsteward; and
b) I have the hands of a lover not a fighter (© Druidh 2009)
HTHPosted 8 years ago
Emphatically “do it”.
You can lock the back end up easily for sure – as you can with rim brakes. I guess a gorilla could lock up the front (or a motorcycling god 😉 ) but I’ve never managed it. Braking is easier so you have more control.
Another benefit for me is reduced mess and no need to replace rims.
These threads tend to get alot of negative comments from folk who don’t use discs on the road. I would ignore them personally, after a few years on discs, I’m not going back to rim brakes.Posted 8 years agojackthedogMember
I use 25x700s with discs.
Following setups used:
Avid BB5s with 160 rotors, pair.
Hayes HFX9s with 160s pair.
Hope mini with 180 on rear / V brake on front.
All with no over-braking problems whatsoever. Your brakes only operate as powerfully as you pull the levers. In fact the only issue I had was with the V-brake in the wet, being generally rubbish and gouging the rim to death.Posted 8 years agomomentumMember
Everyone already said it, but I’ll add my voice. I’ve got a front disc on my surly crosscheck and it’s way better than the canti that was there before or the caliper on another bike. In the dry they’re all fairly similar and the limit of braking is how close I want to come to feeling like I’ll go over the bars, but in the wet the disc is loads better and it’s also generally less effort to brake hard when necessary.Posted 8 years agobrooessMember
My Cotic Roadrat is built up with 25x700c tyres and v-brakes for standard London Village commuting duties. For various reasons I fancy putting discs on there but is this actually a good thing in anyone’s experience?
I like the idea it will brake in wet and dry as well as I’m used from riding the MTB but I remember someone here mentioning the relative lack of grip on road tyres means you’ll just lock the wheel and slide – less control, more pain rather than safer braking.
Any thoughts?Posted 8 years agoMrSmithMember
23c’s on a road fixed. one dura-ace brake 8000+ miles no problems stopping and more than enough power to lock the wheel if needed (don’t ever do though as it usually means lifting the rear wheel).
still on the original pads too.
get disks if you think they will help you stop better, do disks work with drop levers? can’t see how you can be going that fast if you are sat up like a nodder commuter with flat/risersPosted 8 years agoa11ySubscriber
The one regret I have about buying my commuter was not spending a little bit more for discs. Fair enough it’s a CX bike and not a road bike, but my route is largely tarmac.
I forgot how messy rim brakes are and how much maintenance/tinkering they seem to need compared to discs to keep them working properly. Plus eventually my rim walls are going to wear out = added expense.
Shame I don’t have disc mounts on my fork or frame otherwise I’d upgrade.Posted 8 years agodruidhMember
Geoffj has already made my point I think 😀
My “fast” roadie has rim brakes. The mileage I do on that tends to be away from traffic, out on the open roads. The number of times I need the brakes are minimal, and it’s mostly for scrubbing off speed before road junctions – i.e. all pre-planned.
The Sutra – tourer/commuter – has disks. They’re useful in respect of the extra (loaded) weight, and for the fact that one occasionally has to brake when negotiating streets and traffic. I’ve never had a brake lock-up on the Sutra.Posted 8 years agobrooessMember
Various reasons = stopping faster in traffic – London requires you to keep your wits about you I find, and I have some spare sitting around that I’d like to find a use for. The roadrat is also a fast bike and more fun the faster you ride it too!
I’m running a flat bar btw, not dropsPosted 8 years agomk1fanMember
Discs and drop bars? BB-7’s and Cane Creek ‘V-Specific’ levers.
Mudguards and discs? My Inbred has mudguard, pannier rack and (140mm) disc without any issue / fitting faff. Front was a ball ache though. I’m assuming the OP has Roadhog forks on their Roadrat already. The mudguard eyelets are in the ‘normal’ position. Fitting the calliper was a faff. need to turn the mount upside down and shim th ecalliper in and out to get the alignment right. Also turn the rotor round so it rotates in the right direction and then flip the hub. If your tyres are directional you need to swap it round too.Posted 8 years agojackthedogMember
Front was a ball ache though. I’m assuming the OP has Roadhog forks on their Roadrat already. The mudguard eyelets are in the ‘normal’ position. Fitting the calliper was a faff. need to turn the mount upside down and shim th ecalliper in and out to get the alignment right. Also turn the rotor round so it rotates in the right direction and then flip the hub. If your tyres are directional you need to swap it round too.
Regarding the Roadhog fork, with my last discs I fitted the mount upside down like you say, but the pads ended up not properly contacting the rotor resulting in a lip worn in them at the top, which caused rubbing after a while. I also didn’t realise I’d worn the pads almost completely out as they looked fine through the viewing hole 😀
When I fitted the BB5s I didn’t want this to happen again (the pads really should contact the rotor correctly) so I fitted the mount the right way up. I just had to spend a couple of minutes with the file to remove a tiny bit of material from the top corner of it so it didn’t foul the fork leg. It’s very soft alloy and it’s the tiniest bit of material that needs to go.
Now everything aligns properly 🙂Posted 8 years agorichccMember
I’ve just been through the same process deciding what to put on my Roadrat. LX V-brakes which came on it were ok but I did get through a frightening amount of brake block on my commutes in when the weather was wet. So far I’ve gone for an intermediate solution of a BB7 on the front and left the LX V-brake on the back. Will probably stick a BB7 on the back in the fullness of time but will have to have a good look at how it will fit around my mudguards.
Wish we’d had this thread when I was doing mine. Scratched my head a bit with the Avid mount before turning it upside down – can’t understand how you managed to fit the caliper and have it touch the disk at all with the mount right way up? Don’t understand why you needed to shim out the caliper? Didn’t need to shim the BB7 – just used the regular tri-align and the slack in the ISO mount adapterPosted 8 years ago
The topic ‘Disc brakes on a commuter with 25x700c tyres. Good idea/bad idea?’ is closed to new replies.