New Owner - has different size tires than factory, tire pressure question

94fiveohvert · November 16th, 2011, 01:55 PM

I've got a 2010 and it has a Bridgestone Battlax bt090r 140/70/17 m/c 66h tire on the rear, and a battlax bt090f 110/70/17 m/c 54h tire on the front. I weigh 155, and the question is What air pressure should these be run at? I tried searching but haven't seen anything about the bt090's.

csmith12 · November 16th, 2011, 03:14 PM

Air pressure is a fickle thing. You will not get 100% straight answers on your question. It just depends on to many factors. Temp, Weight, type of riding you wanna do, weather (wet) and so on...

A good starting point might be 30/31 (rear/front) and adjust + or - for temp and riding preferences.

94fiveohvert · November 16th, 2011, 03:23 PM

thanks chris, just didn't know if it would be much different with the bigger tires.

Boom King · November 16th, 2011, 04:02 PM

The front tire size and load rating is the same as the stock IRCs so you can run them at the stock PSI of 28. The rear is just slightly wider and has a higher load rating so you can run them at the same stock PSI of 32 as that will be sufficient enough to meet or exceed the load capacity of the OE tires. That's my understanding at least. If I'm wrong, I'm sure one of the vets here will chime in. Also, like Chris mentioned, air pressure can depend on a number of factors.

94fiveohvert · November 16th, 2011, 04:05 PM

also, don't know how much it matters, but they are radials.

Boom King · November 16th, 2011, 04:37 PM

I think you're still fine going with the stock PSI or the figures that Chris suggested. The radials will probably feel a bit softer than the bias OE tires so you could probably pump the front up to 30 PSI.

Edit: I found a DIY where one of the members (former) ran the BT090s with 30/30 front/rear and that seemed to work for him.

November 16th, 2011, 01:55 PM	#1
94fiveohvert ninjette.org member Name: United States Location: oklahoma city, ok Join Date: Oct 2011 Motorcycle(s): ninja 250r, crf 50 Posts: 120	New Owner - has different size tires than factory, tire pressure question I've got a 2010 and it has a Bridgestone Battlax bt090r 140/70/17 m/c 66h tire on the rear, and a battlax bt090f 110/70/17 m/c 54h tire on the front. I weigh 155, and the question is What air pressure should these be run at? I tried searching but haven't seen anything about the bt090's.

November 16th, 2011, 03:14 PM	#2
csmith12 The Corner Whisperer Name: Chris (aka Reactor) Location: Northern KY Join Date: May 2011 Motorcycle(s): 2010 250 (track), 1992 250, 2006 R6 (street/track), 2008 R6 (track) Posts: Too much. MOTY 2015, MOTM - Nov '12, Nov '13	Air pressure is a fickle thing. You will not get 100% straight answers on your question. It just depends on to many factors. Temp, Weight, type of riding you wanna do, weather (wet) and so on... A good starting point might be 30/31 (rear/front) and adjust + or - for temp and riding preferences. __________________________________________________ Goal: Shake A Million Hands \| Look through the corners \| Track Day Prep \| Closest track? \| The Mid-Ohio School

November 16th, 2011, 04:37 PM	#6
Boom King So, where's the reverse? Name: Anson Location: Ontario, Canada Join Date: Nov 2010 Motorcycle(s): 2009 Kawasaki Ninja 250R Posts: A lot.	I think you're still fine going with the stock PSI or the figures that Chris suggested. The radials will probably feel a bit softer than the bias OE tires so you could probably pump the front up to 30 PSI. Edit: I found a DIY where one of the members (former) ran the BT090s with 30/30 front/rear and that seemed to work for him. Last futzed with by Boom King; November 16th, 2011 at 04:43 PM. Reason: Found link

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November 16th, 2011, 03:23 PM	#3
94fiveohvert ninjette.org member Name: United States Location: oklahoma city, ok Join Date: Oct 2011 Motorcycle(s): ninja 250r, crf 50 Posts: 120	thanks chris, just didn't know if it would be much different with the bigger tires.

November 16th, 2011, 04:02 PM	#4
Boom King So, where's the reverse? Name: Anson Location: Ontario, Canada Join Date: Nov 2010 Motorcycle(s): 2009 Kawasaki Ninja 250R Posts: A lot.	The front tire size and load rating is the same as the stock IRCs so you can run them at the stock PSI of 28. The rear is just slightly wider and has a higher load rating so you can run them at the same stock PSI of 32 as that will be sufficient enough to meet or exceed the load capacity of the OE tires. That's my understanding at least. If I'm wrong, I'm sure one of the vets here will chime in. Also, like Chris mentioned, air pressure can depend on a number of factors.

November 16th, 2011, 04:05 PM	#5
94fiveohvert ninjette.org member Name: United States Location: oklahoma city, ok Join Date: Oct 2011 Motorcycle(s): ninja 250r, crf 50 Posts: 120	also, don't know how much it matters, but they are radials.