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Mavic Open Pro and tire pressure

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Mavic Open Pro and tire pressure

Old 05-02-07, 11:25 AM
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el twe
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Mavic Open Pro and tire pressure

Open Pros come with a sticker over the seam saying max pressure on a 700x20 is 145 PSI and x28 is 116. How realistic is this warning, and what are the concerns of running a 700x25 tire at 120-130 pounds on an Open Pro?
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I explained that he could never pay me enough cash for the amount of work I had put into that bike and the only way to compensate me for it was to ride the hell out of it.
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Old 05-02-07, 11:31 AM
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No concern whatsoever as far as the tire failing. But I run about 90-100 in the front to gain the maximum traction. You don't want the front wheel slipping around corners. 120 in the rear is good, since it carries the most weight.
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Old 05-02-07, 11:35 AM
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I mostly am concerned about long-term rim failure.
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Originally Posted by CardiacKid View Post
I explained that he could never pay me enough cash for the amount of work I had put into that bike and the only way to compensate me for it was to ride the hell out of it.
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Old 05-02-07, 12:43 PM
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I have 32s 3X OPs and currently have a 700*23 mix: Mich PR up front and Vred in the rear, run 120 psi, weigh 200# and have ridden this wheelset for 3 years with no issues so far. Trued the rear once to replace a busted aluminum nipple.
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Old 05-02-07, 12:56 PM
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What 700x25 are you running that suggests that high a pressure is a good idea? IMO you are fighting the suggestion of both the tire and the rim here. Long term there is a chance of a sidewall (brake area of the rim not tire sidewall) blowout but that wont be for a while. In reality you are probably well within the safety margins. You have to know Mavic's lawyers wont let them put the actual limit on there...clearly some safety margin built in.
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Old 05-02-07, 02:16 PM
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Originally Posted by el twe
, and what are the concerns of running a 700x25 tire at 120-130 pounds on an Open Pro?
1) beating your rear around unecessarily, and,

2) increasing your rolling resistence. Unless you weigh about 375lbs you dont need to run 130lbs psi on a 25c tire.
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Old 05-02-07, 02:20 PM
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Originally Posted by el twe
Open Pros come with a sticker over the seam saying max pressure on a 700x20 is 145 PSI and x28 is 116. How realistic is this warning, and what are the concerns of running a 700x25 tire at 120-130 pounds on an Open Pro?
I had a catastrophic sidewall failure (approx. 8" of it blew out) on an Open Pro ceramic. Tire pressure 150 (700x20). It blew after a long decent while on the brakes. I now keep a much closer eye on sidewall wear.
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Old 05-02-07, 08:03 PM
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I just purchased this exact setup. Stick with the lower of all suggested pressures. No reason to run that much in a 25.
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