Cross Winds

[nigsey]

Pleased to report that my problem with the rear end slewing in crosswinds, pardon the expression, was resolved after upping the tyre pressure to 28Ib. Thank you Nulli Secundus and Bill T for your sound advice.

 

[Michael Vane-Hunt]

Good thing spellchecker did not correct to spewing.

 

[Monkeypants]

On a Vincent with standard suspension there is no great need to raise the tyre pressures as you do with modern bikes. This is because the weight of the passenger and/or luggage is not directly transferred to the rear suspension or rear wheel. A fully sprung Vincent (Series D) is a different matter. Start with 30 front and 32 rear and adjust from there. A good test is to inflate tyres, go for a decent ride and immediately check pressures when parked. If the pressures have increased by more than 10% then the original pressures are wrong.

True the passenger weight doesn't go to the supension, but it does go directly to the rear wheel. Where else can it go?
I once placed a 250 lb barbell on the pillion position of a standard c Vincent. Deflection of the rear suspension unit was negligible.
Deflection in the rear tire did not require measurement, it was obvious!
There are just two wheels to carry all of the weight. The rear gets the full passenger and a whole lot more.
The same is true with full suspension, except the big bumps are at least dampened through the suspension, a lot less shocking for the rear wheel and tire.
Luggage weight is another topic.
All of the Vincent luggage mounts I've looked at are fully suspended, but there may be some types that aren't.


Glen