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Post by mgtimothy on Apr 10, 2006 14:57:44 GMT 8
let's go back to the cheapo brands...
a friend of mine who's just started biking crashed a few days ago on a 70km/h downhill left-hand u-turn. he's using MOB 1.38" tires available from many LBS for less than P300.
question: is anyone here of the opinion that them cheap tires lost traction during the turn, or was the his speed simply too good for him?
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Post by anthrax76 on Apr 11, 2006 11:57:42 GMT 8
just my 0.02 cents that's a 1.38", my dad uses them only on pavement. because it has a small contact patch. and yeah, that cornering speed on a small volume tire is not supposed to be done i've used cheap tires, yeah even the 150 per piece (haven't tried MOB yet). traction is okay but the rubber compound is a bit soft for my riding style.
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Post by Dragunov on Apr 11, 2006 12:12:19 GMT 8
mob usually uses hard compound rubber, i guess that translates to durability but not traction, u have to use soft compound to get better traction or wider tires , i guess your friend crash due to both reasons which are being out of control at high speed and limited traction, and why would your friend do a 70kph corner?is he racing? i guess newbies will always have a hard lesson to learn
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Post by allegra on Apr 11, 2006 12:38:17 GMT 8
let's go back to the cheapo brands... a friend of mine who's just started biking crashed a few days ago on a 70km/h downhill left-hand u-turn. he's using MOB 1.38" tires available from many LBS for less than P300. question: is anyone here of the opinion that them cheap tires lost traction during the turn, or was the his speed simply too good for him? pre, I dont think I can do a 70kph left-hand u-turn on my car It wasnt the tire , he was going too fast sa description mo
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Post by Ben Dover on Apr 11, 2006 12:38:40 GMT 8
who can do a 70kph on a u-turn? unless that turn is cambered for that speed, di ko gagawin yan even on 2.5 slicks. pwede 20kph
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Post by king on Apr 11, 2006 13:27:23 GMT 8
uh.. how wide was the u-turn? i dont think you can blame that on the tire. some roadies go as fast as that (or faster) on curves on thinner tires with and even smaller contact patches (700c x 20 at 120 psi). but a u-turn at that speed sounds like a bad idea on any kind of tire
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Post by mountguitars on Apr 11, 2006 16:17:11 GMT 8
uh.. how wide was the u-turn? i dont think you can blame that on the tire. some roadies go as fast as that (or faster) on curves on thinner tires with and even smaller contact patches (700c x 20 at 120 psi). but a u-turn at that speed sounds like a bad idea on any kind of tire yeah, its like doing a russian roulette using a fully loaded revolver, hehe. ;D
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Post by mgtimothy on Apr 18, 2006 13:30:38 GMT 8
this was on pavement, and he was using a mtb, trying to keep up with roadies. don't know the dimensions of the turn, but if it helps, this happened on the zigzag downhill going to mariveles, bataan. the turn isn't cambered.
them roadies were very familiar with the road, and were zipping by at close to 100 kp/h (according to their kwentuhan after the ride).
so do we come to the conclusion that: when i get to travel on that road, i'm just going to brake hard and let the road bikes go?
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Post by Ben Dover on Apr 18, 2006 14:14:04 GMT 8
there is this technique called counter steering employed by more seasoned riders on really fast turns...i think another term for it is leaning-in (?)...i suggest you make some research on this subject...i have not tried it myself on such speeds so i wont dare tell you how to do it in my own words...am not even sure whether i'm executing it properly.
good luck.
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Post by jakecastle on Apr 26, 2006 23:41:49 GMT 8
70 kph u turn? does he think he's riding the bat mobile with a grappling hook attached to a lamp post?
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