My Series B single is currently running 19" wheels front and rear. The rims and spokes are quite old and oxidized. I'm considering having new wheels built up with a 21" front rim and 19" rear. I'd like to use shouldered alloy Borrani rims. Looking at the offerings from Buchanan's Wheels here in the US, Borrani offer a 21" 40 hole WM1 rim but not a similar WM2 rim. For the rear, I can get a 40 hole 19" WM2 or WM3.
For tires, the "modern" Avon RoadRiders come in a 21" 90/90 aspect ratio but they suggest a WM2 or WM3 rim for that tire. The "classic" Avon Speedmaster comes in a 21" and Avon recommends a WM2 rim for that tire as well, although rim sizes of WM1-WM3 are listed as alternatives. So, fitting the Speedmaster on a 21" Borrani would not be a problem, but fitting a 21" SpeedRider would require mounting the tire on an "undersized" rim.
My questions:
- If I stick with the 21" WM1 Borrani front rim, what would this group recommend for tires?
- If I use a classic Speedmaster up front, should I combine that with the classic 19" Safety Mileage at the stern (and what's the difference between SM A, B & C)?
- Is there a consensus on what works well with the 21"/19" combination of wheel sizes?
Thanks in advance for any advice...
For tires, the "modern" Avon RoadRiders come in a 21" 90/90 aspect ratio but they suggest a WM2 or WM3 rim for that tire. The "classic" Avon Speedmaster comes in a 21" and Avon recommends a WM2 rim for that tire as well, although rim sizes of WM1-WM3 are listed as alternatives. So, fitting the Speedmaster on a 21" Borrani would not be a problem, but fitting a 21" SpeedRider would require mounting the tire on an "undersized" rim.
My questions:
- If I stick with the 21" WM1 Borrani front rim, what would this group recommend for tires?
- If I use a classic Speedmaster up front, should I combine that with the classic 19" Safety Mileage at the stern (and what's the difference between SM A, B & C)?
- Is there a consensus on what works well with the 21"/19" combination of wheel sizes?
Thanks in advance for any advice...