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Old 05-26-2015, 07:31 PM   #1
Byrnesy OP
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DR650 Tyre Pressures

Blokes I finally got the DR rego'd and on the road. Went for a ride with a mate, first time on dirt and I was thrown in the deep end. With all the bad weather in the Hunter Valley recently we went cross country south of Kurri out to Sandy Creek Road near Quorrobolong on tracks that normally a two wheel drive could get across. They are now copious amounts of red clay, sand, ruts and big water holes full of grey silt. All things considered I only had one moment when I did'nt roll off the throttle as I bumped out of deep water hole and wasnt on the clutch so ended up bush but stayed on and upright.

The DR has Dunlop 952F on the front and Pirelli MT21 on the rear. From the out set the mate said I had to much pressure in them, 22psi front & 25psi rear. So he and his mate let some out of them just judging by feel. I havent checked what they ended up at. But it felt alright on the tar on the way back at highway speeds.

So what is the go? One pressure for tracks and another for dirt roads and tar or can you find a happy medium?
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Old 05-26-2015, 07:36 PM   #2
Aussie Trev
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Put your helmet on, get hold of some fire proof protective clothing and prepare for the 'incoming'.

In the meantime...have a look here...

http://www.advrider.com/forums/showt...+tyre+pressure
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Old 05-26-2015, 09:30 PM   #3
DR Ozzy
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One of the most interesting things I ever came across regarding tyre pressures is "rim clean", probably had more to do with competition than just adventure riding but was fascinating nevertheless, google it if you haven't heard of it.
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Old 05-26-2015, 11:43 PM   #4
ECKS-Man
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Tyre pressures are such a personal thing. I like mine low, like 12psi, but I ride a DRZ250 and mostly off road on technical snotty single trail. Low pressures at highway speeds will lead to the tube being scrubbed inside the tyre and the tube eventually breaking down, and it will be worse on hard surfaces than soft. Pressures will depend on the load you are carrying, the speed you are travelling, the surface you are riding on, the brand and quality of the tyres and tubes and, most important, personal preference. For an unladen DR650, 18-22 psi should be fine on the road. The usual disclaimers apply!

Now, as to what air to use to achieve the required pressures... well, that's another thread! (Great read too!)
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Old 05-26-2015, 11:58 PM   #5
Tenerrod
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Depends what oil you're using
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Old Yesterday, 12:02 AM   #6
darren70
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Quote:
Originally Posted by DR Ozzy View Post
One of the most interesting things I ever came across regarding tyre pressures is "rim clean", probably had more to do with competition than just adventure riding but was fascinating nevertheless, google it if you haven't heard of it.
I thought that was what you ended up with after a rim job?
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Old Yesterday, 12:34 AM   #7
buckscreek
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Are the tyres new or worn? % tread remaining?
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Old Yesterday, 12:45 AM   #8
Hoots
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Quote:
Originally Posted by darren70 View Post
I thought that was what you ended up with after a rim job?
You're a bad man

But I think the OP is just a bored psychology student who likes prodding old blokes with a stick while they're sleeping on the porch, to see if he can get a reaction
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Old Yesterday, 12:57 AM   #9
Big Willy
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just run 14psi front and back, dirt and road and you'll be fine
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Old Yesterday, 03:17 PM   #10
XRman
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that depends

14 psi for standard dirt riding

>=18 psi for rocks

12 psi if muddy

8-10 psi for sand

higher speed add pressure

higher load add pressure

heavy bike with so so suspension ( read DR650) add pressure

no rim locks 18 -22 psi

charging riding style that hits things hard add pressure.

That about covers it
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Old Yesterday, 03:40 PM   #11
Austrailraider
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Quote:
Originally Posted by XRman View Post
14 psi for standard dirt riding

>=18 psi for rocks

12 psi if muddy

8-10 psi for sand

higher speed add pressure

higher load add pressure

heavy bike with so so suspension ( read DR650) add pressure

no rim locks 18 -22 psi

charging riding style that hits things hard add pressure.

That about covers it
Sooooooo Toby Price, on a DR650 no rim locks, at the 4 day = 85 PSI
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Old Yesterday, 03:50 PM   #12
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Quote:
Originally Posted by Austrailraider View Post
Sooooooo Toby Price, on a DR650 no rim locks, at the 4 day = 85 PSI
Only in the back

The front would never touch the ground.
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Old Yesterday, 04:52 PM   #13
XRman
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tyres why?

Quote:
Originally Posted by bigbrad View Post
Only in the back

The front would never touch the ground.
He would probably run it on the rims alone!!!! ( and still be faster than most)
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