Trainer Tires ???
12-19-12, 06:27 AM
#26
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My old conti gp3000 has turned shiny on the trainer bike as it's picked up some aluminum from the drum. Become indestructible.
12-19-12, 07:24 AM
#27
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I just got a used Kurt Kinetic and even if I crank down the resistance unit to the max (5 turns) and lower my tire pressure I can still make it slip. Running a 23mm Conti GP4000S tire. I am certainly no Chris Hoy ... so I am wondering if a dedicated trainer tire on an extra wheel would help or is it just a waste of money.
thanks.
thanks.
Get something cheap or get trainer tire - those are much more silent, if that is important to you (to me it is, so buying it is worth it).
Some slippage is normal, and is not really a problem.
12-19-12, 09:26 PM
#28
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I used Schwalbe Insider Trainer and now am testing Conti Ultra Sport HomeTrainer - both are equally great. I like Schwalbe a little better due to the color and price (a little cheaper); should have it in stock in few months (harder to get).
12-19-12, 09:34 PM
#29
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I have a KK too, but it's fluid and does not have a resistance unit, just the screw that drives the roller up against the rear wheel. I run old nearly bald road tires at about 60 psi. and tighten it up to about a 1 inch wide flat spot on tire. I grab the wheel and give it a few good yanks back and forth to make sure it just squeaks a little and isnt slippin. once warmed up no slippage with multiple jumps and KK computer pegged at 999 watts.
12-19-12, 09:35 PM
#30
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12-19-12, 09:39 PM
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I've run pressures at 100 and 110 (my usual road pressure). 23mm GP4KS on a Hed C2 rim. I've cranked down to as much as 4 full turns and I can make it slip from a stop or from a spin if I shift and stand. It doesn't slip during steady state work just at the first kick of any sprint. Maybe this is normal? The responses above seem to indicate a specialized trainer tire isn't worth it. I can buy a cheap tire and put on an extra rear wheel I have.
12-19-12, 11:39 PM
#32
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If your tire is getting a silver coating that is an indication the tire is slipping. Either the tire pressure is too low or the roller pressure is too low.
12-20-12, 06:32 PM
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not necessarily. the roller is losing some of its chroming due to the heat/friction and as the tire heats up it adheres; that doesn't translate into a slick coating in the center. It's more of a light buildup on the parts of the tire that aren't doing the brunt of the work. I doubt you could get close to 500 watts if it is slipping.
12-20-12, 06:40 PM
#34
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not necessarily. the roller is losing some of its chroming due to the heat/friction and as the tire heats up it adheres; that doesn't translate into a slick coating in the center. It's more of a light buildup on the parts of the tire that aren't doing the brunt of the work. I doubt you could get close to 500 watts if it is slipping.
12-21-12, 09:27 PM
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My experience has been that if you are getting silver on the tires it is as a result of the roller not being tight enough. I've had it in the past and remedied it by tightening the roller. The roller is just aluminum and wouldn't be coming off unless the tire was slipping a little. It doesn't mean you can't transfer power, just that there is a small amount of slippage.
12-22-12, 02:24 PM
#36
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I think OP has the information he needed, but since you brought it up, the roller is Stainless Steel, not aluminum. That is why it is flaking ever so minutely and causing a sheen on my tire after many many hours of use. Steel becomes "stainless" bc it receives a chromium oxide film on the steel surface. That's why my tire has a silver sheen, not bc it is slipping. I don't like my tire slippin on my trainer; that would make sprint workouts impossible. The unit that houses the fluid is cast aluminum.
12-23-12, 05:12 AM
#37
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Don't decrease the tire pressure. Increase it to make it stop slipping. It's a smooth surface; surface area of the contact patch doesn't change the friction against the roller. Tire pressure puts a limit on the pressure on the tire patch; if you want more friction on the tire patch, you want more force against the tire patch, in which case you want more air pressure in the tire.
You can do stomp type intervals on a trainer. Quick accelerations, whatever.
If you use a trainer tire, remember it's there. This sounds stupid, but the old ones were a godawful orange for a reason. Now that they are black....and they are an extremely hard compound so riding on them is not a good idea.
I tell people to just hang on to their old tires when they switch them out and use them for the trainer.
