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what tire/tube would you trust at 80 plus KPH, now(7 posts)

what tire/tube would you trust at 80 plus KPH, nowjiggs
May 28, 2003 10:40 AM
that I have the chance I will likely get out on the loop they will race the worlds on in October and the run down the Claremont should be 70 to 80 KPH I had a carbon comp blow (6" split) at about 50 KPH and am uncertain if there is a bulletproof setup to make it safer on those long steep downhill runs.
I hit over 50 mph on every single rideDougSloan
May 28, 2003 10:43 AM
Around here, I hit around 50-55 mph (88 kph) nearly every ride, and don't even think about tires much. Just check them out before riding, keep pressures up and consistent, and don't run over stuff.

Doug
I hit over 50 mph on every single rideStepan
May 28, 2003 11:40 AM
Doug,
Where do you hit 50-55 around Fresno??
Are you drafting behind a semi on 99??
foothills / mountainsDougSloan
May 22, 2003 1:22 PM
I live in northeast Fresno, and the hills are about 10 minutes away on the bike. Sky Harbor Road has at least 4 places to top 50 mph. Lots more in the mountains.

Doug
any tirealansutton
May 28, 2003 11:10 AM
Even on my cheapo townie with Wallmart tires I cruise downhills at 45+mph.
but 1400 gm wheels, 145 gm tires, and 70 gm tubes make ajiggs
May 28, 2003 5:37 PM
difference. Maybe I should have described light weight tires. I have lightened up, especially rotating weight to where I am now tentative when I ride faster downhill. Just wondered how light you go and still stay safe.
Supersonics or Ultraspeeds?jw25
May 29, 2003 7:44 AM
Personally, I wouldn't trust either of those tires on a fast descent. I did rode and race a set of Supersonics, but after I saw how many cuts they picked up on a smooth, swept course, I decided to trade some weight for durability. Don't get me wrong, they were fine tires, and felt better than the GP 3000's that replaced them, but they're paper-thin.
Haven't ridden the Vittorias, but I imagine they're much the same.
I've hit 45 mph on descents, but we don't have the long mountain descents here in PA, so that's about top speed. I've never felt tentative on anything I've run, which runs the gamut. Hutchinson Reflex Golds, Michelin Axial Pros, Rubino Pros, Stradius Pros, and GP 3000's.
Of course, if you hit something at that speed, F=mVsquared means a stone or pothole will do much more damage at 80 kph than at 40. So, watch the road, but if it's a Worlds course, it should be in good repair generally. And, check tire inflation, and keep it sane. Going up to the max does not equal faster, just harsher. Cornering also suffers, and at speed, it's nice to corner well.
Also, remember to throw the computer on, so you can capture your max speed for posterity...