I got new tyres today - OE Dunlops only part-worn, but told the shop to give them to someone they don't like. Fitter told me it's a 17mm allen key for the front spindle.
Sadly the speedo now registers around 1/3 actual speed - suspect he knackered it changing the tyre. Has anyone has a similar problem? If I need a new sender, will run a book on how long it takes to come. I know the Aprilia ones are very fragile, easy to break them changing a wheel.
Yes as Mr Tostan says,the speed sensor at the rear wheel is pulsed by the 6 disc mounting bolts.The gap should be 1mm.It looks adjustable on the tnt and is prob the same on trek. If it is incorrect I would look carefully in case a spacer has been missed etc.. ?? I would not think it should have been disturbed ,but may have been knocked as they fitted the wheel.