- what size rear rotor on a DH bike 203 or 180
Depends on you and your brakes, and where you ride tbh- are you massive, are you a brake dragger, are your brakes weak or strong? Are your runs 30 seconds or 10 minutes?
I could get away with 180/160 on mine- I’m light, my brakes are mighty and I don’t overburden them with heat. But I still use 203/180 because it makes no real difference and gives me a bit more margin. I managed to turn a 180/160 set on my Hemlock some very pretty colours at fort william but that was a very brake-draggy run
Downside of big rotors- weight, which isn’t that big a deal on a dh bike. Impact resistance- they stick out more and they’re easier to bend. And can be a bit less subtle/harder to modulate. Downsides of too small rotors- you cook your brakes, ruin your pads, and crash into a tree at the speed of light.Posted 4 years ago
I’m 15 stone, 2013 XT brakes with cooling fins on the pads, XT rotors , I have a 203mm and a 180mm , but would buy another 203mm if it was advised, never done DH before so will probably be using them alot , with plenty of butt twitching :D, will be riding Llangollen, Antur Stiniog and a couple of other local tracks, never ridden any of them so its going to be a good year for learning, hoping to book a coaching lesson with Neil Donoghue then hopefully have a good time, I’m not racing its just for fun. 😀Posted 4 years ago
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