Q. Can I upgrade the rear wheel size of avenger street 160 from 15 to 16inch?

The recommended tyre size for Bajaj Avenger Street 160 is Front:-90/90-17, Rear:- 130/90-15. Moreover, upsizing the tyres is a possibility but there will be some effects on vehicle performance. If you replace any part with a different spec, you will most probably have to change some other related parts as well. So, if you upsize your tire, there is a chance that it might start brushing the swingarm and that will result in faster wear and tear than the normal rate. In terms of performance, with a wider tire, the performance will also be on the decrease, which can be seen in the fuel economy and the top speed of the bike. Also, the increased contact of the tire with the surface results in increased efforts to handle the bike.

It's your choice dear