Extra pressure in trainer tires OK?
01-11-12, 11:42 AM
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Extra pressure in trainer tires OK?
Does anyone see anything wrong with using extra rear tire pressure when using a trainer?
Supposedly the US Department of Transportation (or is it the Consumer Product Safety Commission?) specifies that bike tires must be able to withstand twice the maximum inflation pressure listed on the sidewall.
In order to prevent the melted mess which some say their tires turn in to, why not use extra pressure, maybe even beyond what is stated on the sidewall, in order to allow a smaller contact patch to turn the trainer and save the tire from heat by deforming less rubber?
Supposedly the US Department of Transportation (or is it the Consumer Product Safety Commission?) specifies that bike tires must be able to withstand twice the maximum inflation pressure listed on the sidewall.
In order to prevent the melted mess which some say their tires turn in to, why not use extra pressure, maybe even beyond what is stated on the sidewall, in order to allow a smaller contact patch to turn the trainer and save the tire from heat by deforming less rubber?
01-11-12, 11:55 AM
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I suppose it can't do any real harm since a blow off just makes a LOUD noise in your garage or where ever your trainer is located. It will certainly disturb your family but won't cause an accident. However, it shouldn't be necessary. Proper pressure on the trainer's rollers should not wear a tire rapidly. My trainer tires last a long time even if I use worn tires not suited for regular riding anymore.
Here is a useful way to judge if you have the tire's force on the roller the proper range; grab the rear wheel by hand and attempt to yank it around the direction of rotation. A sharp yank should cause the tire to slip slightly. If the tire slips easily the load is inadequate and if it doesn't slip at all, the load is too high. Either way the tire will wear and/or heat excessively.
Here is a useful way to judge if you have the tire's force on the roller the proper range; grab the rear wheel by hand and attempt to yank it around the direction of rotation. A sharp yank should cause the tire to slip slightly. If the tire slips easily the load is inadequate and if it doesn't slip at all, the load is too high. Either way the tire will wear and/or heat excessively.
01-11-12, 12:03 PM
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01-11-12, 12:09 PM
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there are from companies like Continental . Trainer tires..
I have some foam captive air/airless tires.. they are noticably higher rolling resistance on the street..
But I thought .. that they would be well suited to be on a spare wheel, just for the trainer .
where the rolling resistance matters less since the work out ..
is why you get on the trainer in the first place.. I'd sell them cheap [2.700c,1.27"]
I have some foam captive air/airless tires.. they are noticably higher rolling resistance on the street..
But I thought .. that they would be well suited to be on a spare wheel, just for the trainer .
where the rolling resistance matters less since the work out ..
is why you get on the trainer in the first place.. I'd sell them cheap [2.700c,1.27"]
