Fitted up the 9" 55 et Cup 3 with a 26mm spacer on the rear with stock 1303 guard, tyre fits under nicely. I did have to pull it a touch so it clears on heavy cornering on bumpy roads. There is also minimum clearance at the spring plate and the bump stop has been cut back about 12mm. I dont think you would get a wider rim under a standard guard without substainsal modification.
Cheers
Paul
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