Tyre pressures when loaded

[smithy_6_7]

Hi
After reading the manual it's says the tyre pressures should
Remain the same even though your fully loaded with panniers and what not.
Does anybody else put them higher.
On other bikes I have always raised them slightly depending on the weight I'm taking.
Seems like you could square a the of in no time but if that's what they manual says I suppose it's right

Anybody have any input.


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[ChazzyB]

Pressures quoted by manufacturers usually assume fully loaded. People often reduce pressure for solo, but the book pressures work for me.

 

[tadhgocuilleain]

I would have thought that if the pressures need to be changed, the manufacturer would have stated it. That sounds like I'm being sarcastic, but I'm not. For health and safety, insurance and all sorts of other legal reasons, I'm sure BMW have tested what pressures it should be run at under different loads. If they say they should be the same, I'd leave them the same.

 

[smithy_6_7]

Yep that's what I thought I would of thought BMW would do the testing and if that's what it says that's what I will do


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[(RIP) Johno23]

On my GS (non LC) 2.1F and 2.5R normal load. 2 up and loaded : 2.5F and 2.9R
Can't imagine LC is any different.

 

[smithy_6_7]

On the lc it's 2.4 f 2.9r
Either fully loaded or just rider


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[(RIP) Johno23]

On the lc it's 2.4 f 2.9r
Either fully loaded or just rider


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Doesn't make sense to me.........it's not about the bike it's about the tyre surely?

 

[smithy_6_7]

That's the line I was taking. But this is what it says. Can't mess with the Germans.


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[Deleted account 211025001]

Doesn't make sense to me.........it's not about the bike it's about the tyre surely?

Indeed.

I have always used the tyre manufacturers rec. pressure NOT the bike manufacturers.

I leave the pressure at that whether solo, loaded, raining, cold, hot or track day

Andres

 

[AberdeenAngus]

It doesn't matter that much.

 

[dave hendy]

36psi front 42 psi rear under all road conditions works for me

 

[Engineer]

36psi front 42 psi rear under all road conditions works for me

Mine are are set to the same no matter what the loading.

This is recommended by both BMW and Michelin for all loads for the Anakee 3

2.5/2.9 bar in their language.

 

[Clifton]

It seems with the introduction of TPS manufacturers calibrate them for maximum load pressure and just spec that pressure. Solo I find the bike handling a little skitterish especially on anything less than perfect pavement when running the "recommended" 36/42. 42 tends to wear the center of the rear tyre as well. I never ride two up but loaded for a trip I might puff up close to full pressure but solo w/o much extra weight I found overall that 33/38 works best.

 

[smithy_6_7]

My tyre now has done 3k and has flatted always checked the pressures find that odd.


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[ChazzyB]

Triumph have been specifying 36 psi front (or 34 some bikes), 42 psi rear for yonks (certainly before bike TPMS). They are probably guided by the tyre manufacturers. I have an Aprilia Pegaso where Aprilia do specify different pressure for 2-up, etc. I think they're seriously low and run them at 33/36 as I'm generously-built SOB.

 

[Neil W]

Owned bikes for almost 40 years and every one up until the WC has had different tyre pressures listed for solo and two up use (including previous gs and gsa models ), my cars all have different tyre pressures listed for lightly and fully loaded use so why are the WC models different ?

Although it may explain why the suspension always feels harsh as if the tyre pressures are set too high and it is heavy on tyres

 

[andylel]

Just a thought. I have a GSA with the fancy suspension which I can see might react differently with lowered pressures. Could this be why there is only one setting? Are the non ESA ones different? Are other bikes with fancy electronic suspension also quoting one set of pressures? None of this helps off course but might crystallise some thinking if there are no hard factual answers coming forth about the reasons for one set of pressures.


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[smithy_6_7]

I had a feeling tbaht my with the fancy suspension this was the case maybe it is. But I'm a mere mortal and things like that are magic to me


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[Blackal]

From my limited understanding of bike tyres - surely the increased pressure required prior to a heavier wheel loading - is to maintain the correct(ish) contact patch?

If you leave it standard (say - 2.5b at rear) the tyre patch will be larger, and heat build up greater?

Al

 

[smithy_6_7]

From my limited understanding of bike tyres - surely the increased pressure required prior to a heavier wheel loading - is to maintain the correct(ish) contact patch?

If you leave it standard (say - 2.5b at rear) the tyre patch will be larger, and heat build up greater?

Al

Yeah this is my thoughts which is what I have done with bikes


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