My 2001 Honda Transalp XL650V is fitted with a 17/120 rear tire which needs to be replaced soon. What are the advantages/disadvantages of fitting a 130 or even 140 rear? Would performance, traction be affected and if so the differential on dirt and tar? I am hoping, that apart from cosmetics (the 120 does look a bit wimpy!) I would get better mileage than I got from the current (about 5500 kms.), without sacrificing handling or power.