at the time that happen it was 155/60R13 im now running 165/45 or 50

5.5J

skinnys FTW

Its the low profile tyres that have reduced the gearing and making the spedo read quite a way fast

Yes, it's deffinately the low profiles, just today i went to Santa Pod followed by a friend in his birds Pug 106.

With my Yoko low pro's i was reading 75-80mph, but when i asked him what i was doing it was more like 60-65mph!

Also the faster you go the futher 'out' the speedo becomes, i regularily see 105, but i don't think in reality it's anything like that .