17" vs 15" wheels pros and cons |
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17" vs 15" wheels pros and cons |
moggy |
Aug 23 2015, 01:15 PM
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#1
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Member Group: Members Posts: 192 Joined: 15-December 04 From: Wales Member No.: 3,285 |
I don't seem to see many 914 circuit racers with 17" wheels on. Everyone seems to stick to 15". Is there a reason for this? I'm less bothered about the looks of 17" vs 15", I'm more interested in this from a performance perspective. Who out there has tried both wheel sizes? what size did you decide on, and why?
I personally have 15" (Cookie cutters 7" wide all around) (IMG:http://www.914world.com/bbs2/uploads_offsite/i31.photobucket.com-3285-1440357310.1.jpg) and 17" (Cup1 7"front 9"back) (IMG:http://www.914world.com/bbs2/uploads_offsite/i31.photobucket.com-3285-1440357310.2.jpg) At the moment, I'm forced to use the 17" on tracks where I need the top speed, due to my low ratio gearbox (a hangup from when it was a rally car). The 17" wheels have a 26" overall diameter. Whereas the 15" wheels are used on slower, twisty tracks. There is a huge weight difference between the wheels (including tyres) of 32kg (70.5lbs) total, which is an obvious benefit to sticking to the 15 "cookie cutters. But weight can't be the only reason why you circuit racers stick with the 15", so what are your reasons? |
john914somers |
Aug 24 2015, 12:52 AM
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#2
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Member Group: Members Posts: 59 Joined: 24-January 12 From: sacramento Member No.: 14,051 Region Association: Northern California |
I've been on 17" twists but was thinking about going to 15" merely for the weight and smaller diameter options. An old racer told me that I would be going backwards if I did that and that everybody generally needs to go to something bigger than 15" because of the fitment of bigger brakes. I have a 3.6 and a 915 so I'm probably heavier than most guys and the speeds I'm running I think bigger brakes are a must. I did pick up some 15" Wheels and they don't clear my rotars. Consequently I'm back to looking for some lighter 17's and even considering some 18's but I'm not certain they will fit??? Can someone chime in on 18" fitment? Thanks!
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SirAndy |
Aug 25 2015, 10:59 AM
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#3
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Resident German Group: Admin Posts: 41,679 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
I've been on 17" twists but was thinking about going to 15" merely for the weight and smaller diameter options. An old racer told me that I would be going backwards if I did that and that everybody generally needs to go to something bigger than 15" because of the fitment of bigger brakes. I have a 3.6 and a 915 so I'm probably heavier than most guys and the speeds I'm running I think bigger brakes are a must. I did pick up some 15" Wheels and they don't clear my rotars. Consequently I'm back to looking for some lighter 17's and even considering some 18's but I'm not certain they will fit??? I have Boxster brakes on my car and they do fit under the 15" cookie cutter wheels i run. For the track, i use 10" wide GoodYear R250 slicks with those wheels. (IMG:style_emoticons/default/shades.gif) |
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