- 1. [Spridgets] No real difference in tires (score: 1)
- Author: Frank Clarici <spritenut@comcast.net>
- Date: Wed, 09 Jan 2008 22:16:20 -0500
- Specification Sidewall Radius Diameter Circumference Revs/Mile 155/80-13 4.9in 11.4in 22.8in 71.5in 886 175/70-13 4.8in 11.3in 22.6in 71.1in 891 This is from a chart/calculator a lister sent me to ch
- /html/spridgets/2008-01/msg00270.html (7,855 bytes)
- 2. Re: [Spridgets] No real difference in tires (score: 1)
- Author: Larry Macy <lmacy@phillymgclub.com>
- Date: Wed, 9 Jan 2008 22:33:27 -0500
- 175 or 155 is the tread width in mm (I think). the 80 or 70 is the profile. It is defined as 80% or 70% of width. So a 155/80 is 155 mm wide at the edge of the tread and the sidewall is 124mm (155mm
- /html/spridgets/2008-01/msg00272.html (9,394 bytes)
- 3. Re: [Spridgets] No real difference in tires (score: 1)
- Author: "Timothy H. Collins" <thcollin@mtu.edu>
- Date: Wed, 09 Jan 2008 22:36:27 -0500
- Looks correct. Works like this. Tire width times the aspect ratio divided by 25.4 (to convert to inches) = the sidewall dimension in inches. So.... 175 * .7 / 25.4 = 4.82 inches. Or the sidewall heig
- /html/spridgets/2008-01/msg00273.html (8,105 bytes)
- 4. Re: [Spridgets] No real difference in tires (score: 1)
- Author: Michael D Myers <mdmyers_ct@juno.com>
- Date: Wed, 9 Jan 2008 22:43:03 -0500
- 175s are wider than 155s because that dimension is the widest part of the tire in millimeters. The 70 or 80 is the aspect ratio, which is the height above the bead as a percentage of the width, so t
- /html/spridgets/2008-01/msg00274.html (8,715 bytes)
- 5. Re: [Spridgets] No real difference in tires (score: 1)
- Author: "Biff Jones" <biffjones@verizon.net>
- Date: Wed, 9 Jan 2008 22:52:11 -0500
- The tire width is designated by the stated size, i.e., 155 (mm) ='s 6 1/8", 175 ='s 6 7/8"s. So the difference is 3/4"s wider for the 175's over 155's. _______________________________________________
- /html/spridgets/2008-01/msg00277.html (7,556 bytes)
- 6. Re: [Spridgets] No real difference in tires (score: 1)
- Author: "K. Valentine" <kevin@valentinephoto.net>
- Date: Wed, 9 Jan 2008 23:00:53 -0500
- Frank, These are the widths (in red above) taken from the specs on www.tirerack.com Go to their web site and choose "search by tire size", then click on "Specs" for the tire of your choice. The specs
- /html/spridgets/2008-01/msg00278.html (8,069 bytes)
- 7. Re: [Spridgets] No real difference in tires (score: 1)
- Author: "Guy Weller" <guy.weller@tiscali.co.uk>
- Date: Thu, 10 Jan 2008 11:07:19 -0000
- --==1095935767== Content-Type: text/plain; charset="windows-1250" Content-Transfer-Encoding: 7bit Another angle on this is that the taller sidewall tyres - that is the 80 aspect ration tyres - will d
- /html/spridgets/2008-01/msg00287.html (10,033 bytes)
- 8. Re: [Spridgets] No real difference in tires (score: 1)
- Author: "Chris King" <cbking@alum.rpi.edu>
- Date: Thu, 10 Jan 2008 03:42:39 -0800
- Greater rolling resistance? I thought a skinny tire, with a small aspect ratio, would have less rolling resistance. Why would this be an incorrect thought? Agree with you on cornering and poor handli
- /html/spridgets/2008-01/msg00288.html (10,369 bytes)
- 9. Re: [Spridgets] No real difference in tires (score: 1)
- Author: "Guy Weller" <guy.weller@tiscali.co.uk>
- Date: Thu, 10 Jan 2008 11:58:35 -0000
- You are correct about tread width; wider does have more rolling resistance. But I was only talking of the aspect, or tyre wall height, not the width. I made no mention of the tyre width. Guy --Origi
- /html/spridgets/2008-01/msg00289.html (10,956 bytes)
- 10. Re: [Spridgets] No real difference in tires (score: 1)
- Author: "Larry Daniels" <ladaniels@sbcglobal.net>
- Date: Thu, 10 Jan 2008 08:47:07 -0600
- Guy, why would a taller aspect ratio produce more rolling resistance? Larry Daniels Chris, You are correct about tread width; wider does have more rolling resistance. But I was only talking of the as
- /html/spridgets/2008-01/msg00292.html (9,975 bytes)
- 11. Re: [Spridgets] No real difference in tires (score: 1)
- Author: "Guy Weller" <guy.weller@tiscali.co.uk>
- Date: Thu, 10 Jan 2008 14:53:24 -0000
- Hi Larry, Because there is more flexing of the side walls. You get a larger flat bit on the bottom and more rolling resistance. One can counteract this by increased tyre pressures, but the pressure n
- /html/spridgets/2008-01/msg00300.html (10,651 bytes)
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