Cotic Roadrat – discs or vees ?
Thinking of going for a roadrat now that my work does the cycle to work scheme
Would like to set it up as a commuter and road bike – don’t really do road rides for more than around 30-40 miles though
I’m thinking that Discs would be wasted on something that would have 32mm tyres – i’m guessing the tyres grip wouldn’t make the most of discs and that v brakes would suffice – also cheaper and lighter….
I’m going to go flat bars with bar ends – STI’s are expensive and I never used the drops on my road bike…
What do you think ? Oh and if you’ve got some pics of your set up I’d like to see some !
cheersPosted 8 years agogonetothehillsSubscriber
Discs – every time. Stopping on the proverbial dime in heavy traffic – especially as you’re commuting on it – will be worth it, and the fact that your rims won’t wear through over the winter will be another good reason. I used to have mine as a SS, then as a 1×9 – rack, mudguards, discs, 1.5″ semi slicks – it was ace. Great fun.Posted 8 years agojwrSubscriber
Small discs seem fine to me. Yes, it’s fairly easy to lock a wheel, but I find that discs are lower maintenance and better when riding in wet conditions.
A picture from this morning’s ride. I’ve just converted my ‘rat to Alfine gears with a bit of help from 18bikes.
-jPosted 8 years agogonetothehillsSubscriber
Yes – I’m sure you’re right that the contact patch of the tyre will make a difference, but I just remember enjoying fantastic stopping power on what was essentially a flat barred roadbike – compared to my recollections of V brakes and experience of even really good road calipers.Posted 8 years agotheboatmanMember
I commute daily on a dirt cheap road bike with 23mm tyres and cheap road brakes,and heading into Derby ‘n back I can’t really say I’ve ever felt lacking in braking power. The times I have come a croper, I’m not sure more breaking power would have saved me, but it may well increase your confidence as you may feel more power equals more control. But this said I do think roadrat’s with disks look very natty, and if I had one that may just be good enough reason for me 😳Posted 8 years agosimon@18bikesMember
I’m running Avid BB7 on my Roadrat, by way of a bit of an inbetweener. More for maintenance/rim wear, but the power helps- i’m too used to riding mtb i guess.
There’s a fair wait on flatbar roadrat at the mo- dont know if you were aware on that? If it’s Cyclescheme, OnYourBike or direct scheme- give us a shout!Posted 8 years agoflounderMember
I have discs on mine. Tried to bed the pads in as on a standard mtb. Ten seconds later I was getting intimate with the tarmac. I hadn’t realised that slamming on the brakes with skinny tyres is not smart.
I am a lot more careful now. I have had to use the brakes in emergency situations (scouse minicab drivers) and am pleased to have the discs. They are so much better than Vs in the wet.
Posted 8 years agoCountZeroMember
My Kona Sutra has BB7 road discs with cowhorn bars and barend and crosstop levers. Had touring tyres on, now got Maxxis Locust CX on, and I have never ever had issues with the brakes. They aren’t grabby, so you can always predict the braking point. I could never go back to rim brakes, and anyone who says the tyres have too small a contact patch is talking bollocks, they have obviously never ridden a bike with narrow tyres and discs and are in no position to give an opinion. The OP should make up his mind based on the advise of those with actual experience.Posted 8 years agokelvinSubscriber
Okay, I’m running vees on my roadrat.Posted 8 years ago
It’s easy to forget the faff of moving rim pads about as they wear down super quick during winter commutes. I had.
It’s also easy to forget how useless wet rims are as a breaking surface. I’ve been reminded a few times. Eeek
If you’ve got or getting disk brake compatible hubs then it’s not too expensive to upgrade to discs, I would.MountainMutantMember
Running my commuter rat on disks now on 23 tyres no problem
I had XTR V’s which were good but they wore the rim down so quickly in winter in was unbelievable! Also the mess of brake dust and the permanent fiddling to keep them running at their best was a pain. The disks are fit and forget. I’ve only changed the front pads once in a year (compared to V pads every other month) and they were fabulous Superstar branded.
MMPosted 8 years agoHoratioHufnagelMember
had avid juicy 3’s on my roadrat with 160mm rotors. Never had a problem. Ran 28mm slicks and 32mm CX tyres. In 2 years i never did any maintenance to the discs and they worked fine.
Now on V’s on my commuter (gets locked up in london so got something dead cheap). Utterly terrible in the rain. Would go back to discs in a second if i thought the bike wouldn’t get stolen.Posted 8 years agomostlyharmlessMember
Made up my mind to buy a Roadrat (when they’re back in stock once the euro accreditation red tape hold up is sorted out) I’ve been using my 29er and really want it back as a mountain bike but right now it’s set up as my commuter with 23mm conti gatorskin tyres and avid juicy 7s, 205mm at the front. Stupidly overbraked on paper but I’ve never once had a problem, in fact quite the opposite.
Was thinking of BB7s for the roadrat. Considered the magura HS33s but on second thoughts thats probablyjust a more efficient way to wear out my rims.Posted 8 years agokelvinSubscriber
Cotic do some more affordable disc upgrades for the ROADRAT as well the blingy Hope ones:
Tektro cable disc for drop bar bikes, and Magura Julie hydraulics for the flat bar bikes.
I’m considering trying to fix up my old Hope C2s for mine, although I’m not very good with seals and hosing and fluids. Problem is it means building some disc compatible wheels, or getting some of the disc ready ROADRAT wheels.Posted 8 years agoMountainMutantMember
I like the Pace fork. It is a little longer than the standard fork but doesn’t seem to affect handling so much.
Peeps say the original Roadrat fork is very heavy. I don’t know how it compares to the Pace but I do know that the Roadrat fork bends when you plough flat out into a pedestrian when they walk out on a red man in front of you!
MMPosted 8 years ago
This has got me thinking about my Roadrat. My dilemma is Shimano SLX for £70 or a BB7 for £47 and use existing Deore V brake lever. I’m honestly trying to buy the Avid after reading so many positive reviews but though the SLX is more expensive you seem to just get a lot more for your money…Posted 8 years agoCrayolaMember
Hope Mono Minis on my ‘Rat. Running 32mm Bonty tyres on CXP33s/XT disc hubs.Posted 8 years ago
Lovely set up, 1 finger breaking with no locking up problems whatsoever.
Bear in mind, you might not have the blocky tread to bite the road surface, but with a slick tyre on tarmac, you’ve probably got just as much contact area of rubber-to-road.cynic-alMember
Bear in mind, you might not have the blocky tread to bite the road surface, but with a slick tyre on tarmac, you’ve probably got just as much contact area of rubber-to-road.
At twice the psi, you’d have half the contact area.
You do have shedloads mnore grip due to the tarmac though.Posted 8 years agocySubscriber
The skinny tyre vs braking power thing is a bit counter intuitive, but whilst you get less contact patch, there’s a lot of pressure on it as a result of it’s size, and it’s also pretty constant compared to knobblies. The only time I’ve ever had problems with axle movement under disc braking was with 160mm rotor Hope mini’s on the prototype forks which had a brake mount in the conventional place. It’s not necessarily the ultimate power, but the relentless consistency you can apply on road slicks that means discs are fine. This prompted the move to the ‘wrong way around’ disc mount BTW.
Personally, I go for discs every time, and it’s not actually an ultimate power thing. I’m pretty sure most V’s are less powerful than my teeny disc Hope setup. What V’s are not is more controllable. I’m used to discs now and find V’s horribly grabby, which is way more scarey on a road bike IMO. It is a question of what you’re used to though.
Discs-wise, we’re loving the Tektro cable disc brakes we’ve just got in. Loads cheaper than the BB7’s and work better and easier to set up in our experience. The rotors are prettier too 😉
Bike2Work-wise, you’ll need to speak to any one of our dealers as we’re not registered anymore. They’re all better set up to deal with any upgrades you might want anyway (as Si from 18 mentioned). We’re out of Long Roadrats until early June, but we have the Short length frames in. If you’re 5ft 10in or shorter then one of those sizes could work in flat bar set up and we have flat bar kits in stock. Drop us a line if you want some sizing help.Posted 8 years ago
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