Rushfan
06-05-09, 08:01 AM
Anyone try the new tubeless Hutchisons? Roadbikerider.com raves about them...
Long Distance Competition/Ultracycling, Randonneuring and Endurance Cycling - How to shop for long distance tires?
Bikeforums.net is a forum about nothing but bikes. Our community can help you find information about hard-to-find and localized information like bicycle tours, specialties like where in your area to have your recumbent bike serviced, or what are the best bicycle tires and seats for the activities you use your bike for.rtruectoc
06-05-09, 10:43 AM
" Most pro racers I know just buy performance forte brand cause they are cheap and you never patch them anyway.[/QUOTE]
Pro racers do't pay for tubes, and most likely use sew ups
Pro racers do't pay for tubes, and most likely use sew ups
Road Fan
07-07-09, 10:41 PM
One interesting note to come from Jan Heine's research is the claim that tire "feel" can be misleading. He believes that many tires "feel" fast primarily because they pass along high frequency vibrations. Tires that don't were/are often subjectively rated as "slow" even though the test results say otherwise. I think he might have something there, m'self.
At any rate, I definitely understand the enthusiasm for some of the Grand Bois tires. The 700x30 "Cypres" I had were really, really nice tires, coming close to the feel of the perfect old 27mm Clement Campione del Mondo tubulars I used to love so much. It's just too bad they (the GBs) were so puncture prone. I do note that they are now available in 26mm diameter, however. I might have to try some if I ever get around to building the single speed...
It's an interesting hypothesis, but it needs a lot to be even a theory, and people seem to be acting like it's true. One problem I have with it is that carcass flex requires energy, and if the carcass contains rubber then this flex causes energy dissipation. There's no place that energy can come from but the motion of the bike - it saps energy from the ride, hence it's a source of loss. For reduced tire pressure to result in energy savings (or reduced loss), there must be another result of pressure reduction that "saves" more energy than is dissipated by the casing flex.
At any rate, I definitely understand the enthusiasm for some of the Grand Bois tires. The 700x30 "Cypres" I had were really, really nice tires, coming close to the feel of the perfect old 27mm Clement Campione del Mondo tubulars I used to love so much. It's just too bad they (the GBs) were so puncture prone. I do note that they are now available in 26mm diameter, however. I might have to try some if I ever get around to building the single speed...
It's an interesting hypothesis, but it needs a lot to be even a theory, and people seem to be acting like it's true. One problem I have with it is that carcass flex requires energy, and if the carcass contains rubber then this flex causes energy dissipation. There's no place that energy can come from but the motion of the bike - it saps energy from the ride, hence it's a source of loss. For reduced tire pressure to result in energy savings (or reduced loss), there must be another result of pressure reduction that "saves" more energy than is dissipated by the casing flex.
smurf hunter
07-08-09, 09:32 AM
Here's a decision I have to make for STP (double century) this weekend.
My rear tire is some Specialized Roubaix (something or other) with a kevlar layer. I bought it mid-event a year ago when I destroyed a tire a few miles into a century ride. It's a decent enough tire, but as it has softened, it's developed tiny gashes that are now sucking in debris.
I spent a lot of time cleaning these out and booting on the inside of the tire with those oversized oval shaped tube patches.
A coworker has offered to loan me a pair of Schwalbe Marathon's - which I've used on other bikes. These are almost twice as heavy, but there's little risk of a puncture.
Should I:
1) stick with my rubino pro 25mm front and specialized roubaix 25mm (w/ some pitting)
2) switch front and back to the marathons 25mm
3) switch only my rear to a marathon
I really prefer to ride on 25mm, and with only days from STP local inventory is completely depleted.
Thanks.
My rear tire is some Specialized Roubaix (something or other) with a kevlar layer. I bought it mid-event a year ago when I destroyed a tire a few miles into a century ride. It's a decent enough tire, but as it has softened, it's developed tiny gashes that are now sucking in debris.
I spent a lot of time cleaning these out and booting on the inside of the tire with those oversized oval shaped tube patches.
A coworker has offered to loan me a pair of Schwalbe Marathon's - which I've used on other bikes. These are almost twice as heavy, but there's little risk of a puncture.
Should I:
1) stick with my rubino pro 25mm front and specialized roubaix 25mm (w/ some pitting)
2) switch front and back to the marathons 25mm
3) switch only my rear to a marathon
I really prefer to ride on 25mm, and with only days from STP local inventory is completely depleted.
Thanks.
Carbonfiberboy
07-08-09, 07:39 PM
New tires. You'll find something. 23c will be fine. So option 4). And take 2 tubes and a patch kit with usable glue. How much did you pay for this whole ride package?
smurf hunter
07-08-09, 09:18 PM
I could survive on anything, but I weigh 195lbs, and the STP route south of King Co. is a lot of bumpy chip seal.
When you ask what I paid - my Rubino Pro was ~$40, the Specialized Roubaix ~$50 (was stranded between Enumclaw and Black Diamond with no option). I might have 3000 miles on those tires.
I have 2 spare tubes (new) and patches with me - so am inclined to go with option #1. I've been training all spring on them, am used to the setup. I'm a big Schwalbe fan, but with this being my first double (1 day STP), I'm a little paranoid about making good time. I've got family waiting for me at the finish etc.
When you ask what I paid - my Rubino Pro was ~$40, the Specialized Roubaix ~$50 (was stranded between Enumclaw and Black Diamond with no option). I might have 3000 miles on those tires.
I have 2 spare tubes (new) and patches with me - so am inclined to go with option #1. I've been training all spring on them, am used to the setup. I'm a big Schwalbe fan, but with this being my first double (1 day STP), I'm a little paranoid about making good time. I've got family waiting for me at the finish etc.