I don't get the 42 psi recommended rear tire pressure. - Suzuki GSXS1000 Forum
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post #1 of 17 Old 07-03-2016, 10:14 AM Thread Starter
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I don't get the 42 psi recommended rear tire pressure.

That sure seems like a lot. And the recommendation of 42 psi is the same whether riding single or double. My other motorcycle calls for 36.7 psi in the rear.
I never carry a passenger and only weigh 150 lbs, and have found out thru experimentation using my backside that the ride quality is WAY better at 37psi than at 40 psi. The rear shock is set for minimum preload and a half turn out from full rebound damping. The lower tire pressure greatly removes the jittery feel over small road imperfections.

What is the downside of running 5 psi below the recommended pressure?
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post #2 of 17 Old 07-03-2016, 10:22 AM
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At your weight, probably not a lot, although in general the lower pressure usually equals less mileage out of the tire. Since Suzuki doesn't know who will be riding the bike when they sell it, they have to error on the safe side and use 42 since it is the max tire pressure and the highest load capacity.
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post #3 of 17 Old 07-03-2016, 11:04 AM Thread Starter
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Thanks WERA!
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post #4 of 17 Old 07-03-2016, 11:33 AM
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I run 35psi front/rear. 42 seems too high, IMO
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post #5 of 17 Old 07-03-2016, 12:56 PM
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Honda has a requirement, for its tires, that the motorcycle must be able to hit a curb at x mph, and not suffer rim damage. Maybe Suzuki has similar?

My best guess is the tire pressure is based on the vehicles maximum load.

If you were selling motorcycles, and legally responsible for the information you printed, would you go to paper with air pressure recommendations for a 175lb rider, or use a worst case scenario setting where the rider was 300lbs and his wife 350?

I believe if I were forced to make it simple , easy, and legal, Id go with the heavyweight settings.

I think the days where they could publish the best settings for suspension, or tire pressure were 2001.
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post #6 of 17 Old 07-03-2016, 03:00 PM
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42 is definitely too high especially considering the 190 tire and relatively low bike weight. Lowering it a bit will give you a bigger contact patch and smooth out the ride
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post #7 of 17 Old 07-04-2016, 06:54 AM
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Quote:
Originally Posted by Rusty View Post
That sure seems like a lot. And the recommendation of 42 psi is the same whether riding single or double. My other motorcycle calls for 36.7 psi in the rear.
I never carry a passenger and only weigh 150 lbs, and have found out thru experimentation using my backside that the ride quality is WAY better at 37psi than at 40 psi. The rear shock is set for minimum preload and a half turn out from full rebound damping. The lower tire pressure greatly removes the jittery feel over small road imperfections.

What is the downside of running 5 psi below the recommended pressure?
none really, i run32 front and 24 rear , gives great grip as heats up really fast , but lose out on tyre life. If doing lots of boring straight line touring would go to 35 rear,touring + luggage + pillion + wanted better tyre life might go to 38 psi, rear and 36 front, oh and i am 160 lbs approx. [my scales only do kilos.]
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post #8 of 17 Old 07-04-2016, 07:27 AM Thread Starter
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Great. You guys are confirming what I suspected.
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post #9 of 17 Old 07-04-2016, 11:21 AM
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Do you mean your front pressure is higher than the rear?
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Originally Posted by 4tune8 View Post
none really, i run32 front and 24 rear , gives great grip as heats up really fast , but lose out on tyre life. If doing lots of boring straight line touring would go to 35 rear,touring + luggage + pillion + wanted better tyre life might go to 38 psi, rear and 36 front, oh and i am 160 lbs approx. [my scales only do kilos.]
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post #10 of 17 Old 07-05-2016, 09:12 AM
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Do you mean your front pressure is higher than the rear?
yes, Dunlop says i can go down to 18psi in rear for track use if i want , 32psi front is as low as i want to go , to squishy if too low and loses shape and grip and steering. The rear i use has been designed to run super low for track use, and still hold its shape, and i never put more than 36 psi in front or rear using the Sport Max Dunlops

Last edited by 4tune8; 07-05-2016 at 09:14 AM.
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