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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Tyre/Rim Advice sought
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<blockquote data-quote="CoreyL" data-source="post: 112253" data-attributes="member: 3835"><p>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.</p><p></p><p>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.</p><p></p><p>My questions:</p><p></p><p>- If I stick with the 21" WM1 Borrani front rim, what would this group recommend for tires?</p><p>- 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)?</p><p>- Is there a consensus on what works well with the 21"/19" combination of wheel sizes?</p><p></p><p>Thanks in advance for any advice...</p></blockquote><p></p>
[QUOTE="CoreyL, post: 112253, member: 3835"] 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... [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Tyre/Rim Advice sought
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