How tough are BMW rims? Pressure?

bernardofeio

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How tough are BMW rims? Yesterday I hit a big rock wile off roading and I ear a metallic noise. When I stopped I couldn’t find any mark in the rim or any thing bent….

BTW what it the “normal” pressure in front and rear tyres to go offroad?


bernardo feio
 
I did over 2500 km's just gravel/rocks/sand through Namibia on my R80GS and not a single dent or mark. The KTM and 3 KLR's had all bent rims after the trip :D

On all accounts I did crash and left the road on several more occassions than the other chaps :beerjug:
 
It might be worth going round all your spokes and tapping them with something like a spanner. If all's well they'll ring with pretty much the same tone. If one sounds 'dull' then although it probably looks OK, you may have stripped its thread.

Paul G
 
The best pressure off road depends on the tire, and what you are riding in, sand ,mud, gravel, etc.

Some people like them a bit softer for sand and mud, or if they have full knobbies.

But unless you put on rim locks to hold the tire on the rim you wouldnt want to go much below 20 lbs.

I dont choose to ride in deep sand or mud, so I keep my 70/30 tires at road pressures, and I have never had a puncture, a dented rim or an off in probably 120,000 km of off road riding. I also run extra heavy duty tubes , even with the GS tubeless rims.
 
I’m using TKCs front and rear

in the sand I use very low pressure but I inflate the tyres as son as I reach the tarmac

my main issue is for gravel and rocky pistes...
 
I have had TKCs on me 100GS set at 25 / 33 for off tarmac - not a great amount of sand around here :D any less and you can feel the rocks toooooo much
HTHY :thumb2
 
I never bother to de-flate my tyres whether sand/mud/snow or whatever. My view is if they good enough for the road they good enough for anything. Maybe why I am not the best at keeping the bike the right side up when going off-road :D
 
the difference in the performance is huge when you deflate the tyres… specially for some one as inapt as me! you get more floating capacity when driving in soft sand mud, more traction in rocky pistes and less vibration (good for comfort and for the mechanics)



the main problem when you deflate the tyres is that you can destroy a tyre very easily or you can bent the rim….
 
i tend to go down to 20 psi or there abouts. not that low, but im more worried about the tubeless tyres loosing the seal on the rims. (you cant use rimlocks on tubeless rims). i have cracked a rim but that was fully loaded over pretty hefty terrain. for a year.
 
My GS tubeless rims couldnt be depended on to hold air in any situation, at any pressure, with any tire, so I fitted the best extra heavy duty tudes I could find, and have never had a problem since.

The dealer fitted an 0 ring seal asssembly at the valve stem, presumably to slow sudden deflation, but it has never been required. But I carry Slime
and a pump, just in case.

Dispite the conventional wisdom that tubeless tires run cooler I have found the opposite, presumably the extra thick tube conducts the heat round to the rim giving a bigger cooling area
 
Nippy Normans supply Touratech, Wunderlich, Desert Fox and many other makes of accessories.
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