Mark Adderley Posted June 11, 2007 Share Posted June 11, 2007 I'm having new tyres (AO21s) fitted tomorrow - please can anyone tell me what the yellow and red dots are for? ISTR them having something to do with the valve position, but can't remember exactly what? Thanks Mark 1400 SS - 49k and counting...... Link to comment Share on other sites More sharing options...
Phil Posted June 11, 2007 Share Posted June 11, 2007 The dots relate to the lightest and heaviest positions of the tyre, the idea is to have the lightest part [think it is the red dot on Yokohama] with the tyre valve on the wheel, the result being less lead added to balance the wheel. 😬 X/FLOW 1700 DD 1990 ROAD USE ONLY..SO FAR Link to comment Share on other sites More sharing options...
Stationary M25 Traveller Posted June 11, 2007 Share Posted June 11, 2007 .... ooh - can't use lead any more guv. Has to be even larger lumps of zinc now ...... just in case a child licks the weights, a swan swallows it if you park near a pond, or a church hall stripper takes a shine to your lead and hurts himself trying to steal it while you are blatting at full pelt ! ****************** And you run and you run to catch up with the sun, but it's sinking... And racing around to come up behind you again. photos Link to comment Share on other sites More sharing options...
6speedmanual Posted June 11, 2007 Share Posted June 11, 2007 church hall stripper ❗ When I was a kid we used to find the beetle drive entertainment enough for the church socials ❗ 😬 6SpeedManual *tongue*There's no such thing as too much BHP per Ton 😬 Link to comment Share on other sites More sharing options...
Mark Adderley Posted June 12, 2007 Author Share Posted June 12, 2007 Cheers chaps I'll ask the fitter to target the red spot (that didn't come out quite right! ). Thanks Mark 1400 SS - 49k and counting...... Edited by - Mark Adderley on 12 Jun 2007 07:23:12 Link to comment Share on other sites More sharing options...
Dartmoor7 Posted June 12, 2007 Share Posted June 12, 2007 Almost right.... To facilitate proper balancing, Yokohama places red and yellow marks on the sidewalls of its tires to enable the best possible match-mounting of the tire/wheel assembly. There are two methods of match-mounting Yokohama tires to wheel assemblies using these red or yellow marks: Weight (yellow mark) Uniformity (red mark) Weight Method When performing weight match-mounting, the yellow mark on the tire, indicating the point of lightest weight, should be aligned with the valve stem on the wheel assembly, which represents the heaviest weight point of the wheel assembly. After match-mounting by either of the above methods, the tire/wheel assembly can be balanced. Uniformity Method When performing uniformity match-mounting, the red mark on the tire, indicating the point of maximum radial force variation, should be aligned with the wheel assembly's point of minimum radial run-out, which is generally indicated by a colored dot or a notch somewhere on the wheel assembly (consult manufacturer for details). Radial force variation is the fluctuation in the force that appears in the rotating axis of a tire when a specific load is applied and the tire rotated at a specific speed. It is necessary to minimize radial force variation to ensure trouble-free installation and operation. Not all wheel assemblies indicate the point of minimum radial run-out, rendering uniformity match-mounting sometimes impossible. If the point of minimum radial run-out is not indicated on a wheel assembly, the weight method of match-mounting should be used instead. MY BLAT-O-METER 2007: 35 (to 8th June) 2006: 89 2005: 91 2004: 64 2003: 66 2002: 66 2001: 79 2000: 32 (divorce!) 1999: NRA Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now