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Discussion Starter · #1 ·
Hello fellow riders. Can anyone advise on tire pressure that would be adequate for a rider on the lightweight side of the scale (132 pounds on a good day!). I found the manufacturer's recommended values too high (34psi front ; 42psi rear). Have lowered 2 psi on each and noticed some improvement. Would like to further reduce, but besides tire wear, I am more concerned with handling issues. Cheers!
 

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I don't think you will need to worry about handling issues. I run (based on recommendation) 32/31 hot (Bridgestone S21) on my bike for the track, and I'm almost 200# fully geared. On the street I use 34/38. Something around Rookie's numbers should be good.
 

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I was that weight not too long ago and ran 32/36.. I actually am in the same boat as rookie, I weigh 155 now and still go with 32/36. Try it out should work well for you
 

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I am 170# never carry passengers...I run 34/40. Been thinking of dropping it a bit to see how she handles...
 

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I'm 175lbs and running 34 front 38 rear. I got 9,500 miles out of the stock Corsas with street-only use, and am almost 7,500 miles into a Diablo III tires with no premature wear. I expect them to last at least another 4,000 miles. Handling has also been great.

For your weight, I'd try nothing less than 32 front 36 rear.
 

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Discussion Starter · #8 ·
ST3 tire pressure

Thank you all for posting a reply. Guess will give it a try with 32f/38r and see how ite feels. I am back to riding after a 20+ years gap...thus I feel like a novice again...too give you an idea, the last bkie I had was a 2 stroke 350cc Yamaha RD (back then it had a 1:1 relation between the bike engine power and my weight :) ). Maybe my memory is not that good, but I remember to feel the RD more "glued" to the ground than I feel the ST3...saw some improvement on lowering the tire pressure...let us see if lowering more adds to it.
Changing subjects...have added a Puig screen to my bike...works well on reducing chest wind pressure...much better than the OEM's "bat" like one...and, at least for my taste, better looking... Cheers!
 

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I know that this is an old thread, but the information is just as valid today so I thought I would add some info.

I spoke with my local Triumph dealer while getting new tires installed and they supported the idea of running my tires at 38lbs. They said that, as long as I am not running 2up, I shouldn’t notice any impact on handling.

This follows the advice I received from a Motorcycle Patrol Officer I know who also believes that 42 is too much, especially after seeing my tires. Although not a mechanic or tire specialist, MPOs spend an enormous amount of time on a bike and receive a ton of specialized training every year, so I’m inclined to give his advise a lot of weight.

My OEM Pirelli Diablo Rosso Corsas got about 4500 miles before they showed cords front and rear.
The Pirelli Diablo Rosso Corsa IIs lasted almost 6000 miles before the rears showed their cords..Fronts were down to their wear bars.

I haven’t decided about the front tire pressure. I may shave a pound or I may leave them at 34. In any event, I’ll share the impact when I wear these out, probably in about 11 or 12 months.
 

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Discussion Starter · #10 ·
I know that this is an old thread, but the information is just as valid today so I thought I would add some info.

I spoke with my local Triumph dealer while getting new tires installed and they supported the idea of running my tires at 38lbs. They said that, as long as I am not running 2up, I shouldn’t notice any impact on handling.

This follows the advice I received from a Motorcycle Patrol Officer I know who also believes that 42 is too much, especially after seeing my tires. Although not a mechanic or tire specialist, MPOs spend an enormous amount of time on a bike and receive a ton of specialized training every year, so I’m inclined to give his advise a lot of weight.

My OEM Pirelli Diablo Rosso Corsas got about 4500 miles before they showed cords front and rear.
The Pirelli Diablo Rosso Corsa IIs lasted almost 6000 miles before the rears showed their cords..Fronts were down to their wear bars.

I haven’t decided about the front tire pressure. I may shave a pound or I may leave them at 34. In any event, I’ll share the impact when I wear these out, probably in about 11 or 12 months.
Thanks for dropping this additional info. I have been using 32 front and 38 rear and did not have any issues, be them either handling or wear ones. Ride safe!
 

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A quick update. I just got my bike back with a new set of Corsa IIs at 33/38. They don‘t have the same leaden feel that the Michelin Road 5s did, but neither are they as sharp as they were. I can definitely feel a difference.

I’m not sure which tire pressure is affecting the sharpness of the steering so I’ll have to play with it a bit.

I’ll report back in a few days after I adjust the pressure and take it for a significant ride.
 

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Well, it looks like I've been running the tires lower than I thought anyway. Dealer installed them at 33/38. I brought it home and used my trusty Acurite digital and it read 35/42. Fortunately, I had just picked up an old school analog pencil tire gauge. It read 33/38.

So, unless my digital gauge just suddenly lost accuracy, I've been running them low all along. This kills my low mileage due to over-inflated theory.

Steering still doesn't feel as sharp. Actually, the fronts at 33 have MORE air now. Rear tires are pretty much the same.

I never knew what a difference a couple of pounds could make.
 

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Discussion Starter · #13 ·
My experience is that dropping 4psi at the rear and 2 at the front has made a significant difference.
 

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I know that this is an old thread, but the information is just as valid today so I thought I would add some info.

I spoke with my local Triumph dealer while getting new tires installed and they supported the idea of running my tires at 38lbs. They said that, as long as I am not running 2up, I shouldn’t notice any impact on handling.

This follows the advice I received from a Motorcycle Patrol Officer I know who also believes that 42 is too much, especially after seeing my tires. Although not a mechanic or tire specialist, MPOs spend an enormous amount of time on a bike and receive a ton of specialized training every year, so I’m inclined to give his advise a lot of weight.

My OEM Pirelli Diablo Rosso Corsas got about 4500 miles before they showed cords front and rear.
The Pirelli Diablo Rosso Corsa IIs lasted almost 6000 miles before the rears showed their cords..Fronts were down to their wear bars.

I haven’t decided about the front tire pressure. I may shave a pound or I may leave them at 34. In any event, I’ll share the impact when I wear these out, probably in about 11 or 12 months.
Holy crap, you wait until you see cords to change tires? Wow!
I got like 12k on my 2018 now and about to put third set on. Nabbed the new diablo 4s. Previous 2 rears were diablo 3s. I run 32f\34r and I'm 175.
 

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I have no idea why I get so few miles out of my tires. They look mostly new, except where the cords show. There is so much gravel here that I wonder if it is more damage than wear.
 

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Holy crap, you wait until you see cords to change tires? Wow!
I got like 12k on my 2018 now and about to put third set on. Nabbed the new diablo 4s. Previous 2 rears were diablo 3s. I run 32f\34r and I'm 175.
Miles or Kilometers?

I'm about 205 fully geared. I'm currently running 33/38. I cannot imagine getting 12k miles out of a set of tires the way I am going through them.
 

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170 lbs on ST765RS. With Pirelli SuperCorsa OEM tires, which has a race carcass, I used 32/36 on street and 30/28 on track.
I later switched to Metzler M9RR for better handling in wet and cold. These has street carcass, and need some more pressure to keep the structure, so 34/37 on street and 34/32 on track. Fantastic tires on street, but I miss stiffer carcass on the track during heavy braking and fierce acceleration.
Next tires will be Metzler RaceTec RR K3, as I hope those will be better in wet and cold compared to SuperCorsa. They have race carcass like the SuperCorsa tires and are OEM tires on the new 1200 RS!
 
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