|
Written by shiggy
|
|
Wednesday, 01 July 2009 13:09 |
|
A common question is what is the difference? It depends on the specific tire and company. Some companies, like Conti (Bontrager, Michelin,…), use a lower spec for their wire bead tires. Others (some Panaracer, Nokian,…) make wire and folding bead versions of the same tire with no difference other than the bead. Others the tires look the same but are XC and DH versions (Kenda Blue Groove/Nevegal). You have to check the specs. |
|
Last Updated on Wednesday, 01 July 2009 13:29 |
|
Read more...
|
|
|
Written by shiggy
|
|
Wednesday, 01 July 2009 11:33 |
|
 Mounting and removing tires is a basic and necessary task for every cyclist. A surprising number of riders struggle with it because they have never been shown the proper technique.
The Team Estrogen web site has the best description I have seen: Levers? Levers? We Don’t Need No Stinking Levers! |
|
Last Updated on Monday, 06 July 2009 19:35 |
|
Read more...
|
|
Written by shiggy
|
|
Wednesday, 01 July 2009 11:28 |
|
“… i guess though tire selection is a personal thing and besides terrain perhaps even riding style can determine whether you like or dislike a tire…” He nailed that one and it is especially riding style that comes into play. The sidewall flex/squirm is a very personal thing. Terrain, rider weight, type of riding and riding style all contribute. I tend to like rounder profile tires for the way they track (straight line stability) and change direction. A narrower rim gives most tires this profile. Some say a wider rim reduces pinch flats. I can not say I have noticed much difference and if anything, I pinch more with the same tire on a wider rim. Especially the case if it is a narrowish tire on a wideish rim. |
|
Last Updated on Wednesday, 01 July 2009 13:32 |
|
Read more...
|
|
|
Written by Administrator
|
|
Wednesday, 01 July 2009 10:51 |
 After receiving new samples of the WTB Weirwolf 2.55 LT, WTB Stout 2.3 and Panaracer 2.35 tires, and a set of Salsa Gordo rims I took the opportunity to measure and compare the tire differences on wide and narrower rims. My control rim is an Alex Adventurer (24mm wide outside. 6mm deep from bead seat to rim outer edge). The Gordo is 35mm wide and 5mm deep. Used my usual measuring methods, and subtracted 1mm from the tire casing height for the Gordo measurements to even out the rim depth difference.
|
|
Last Updated on Wednesday, 01 July 2009 11:24 |
|
Read more...
|
|
Written by Administrator
|
|
Tuesday, 30 June 2009 15:28 |
|
 All measurements are made by us.
Before Measuring:
- All tires are inflated to 40 psi
- 26" tires are mounted on a Mavic 261 rim (26mm outside width)
- 29"/700c tires are mounted on a Velocity Dyad rim (24mm outside width)
- Tires have been inflated to 40 psi or more for at least 24 hours
One sample is used for all measurements except weight. All available samples are weighed. | | TW | | Tread Width:
in mm & inches | Widest point of the tread. Measured at four different points and averaged. Tread width may be narrower than casing width on some tires. | | CW | | Casing Width:
in mm & inches | Widest point of the casing. Measured at four different points and averaged. Casing width may be wider than tread width on some tires. | | CH | | Casing Height:
in mm | Distance from top edge of the rim to the top of the casing. Does not include tread depth. Does include thickness of tread base rubber. | | TD1 | | Tread Depth at Center:
in mm | Top of the tallest tread block to the base rubber at the center line of the tire. | | TD2 | | Tread Depth at Edge:
in mm | Top of the tallest tread block to base rubber at the outermost edge of the tire. | | R1 | | Overall Radius:
in mm | Distance from center of hub axle to top of the tire. | | R2 | | Radius at Widest
Point of Tire:
in mm | Distance from center of hub axle to widest point of the tire. This may be the casing or the tread. | | |  | Volume Index v.3 | A relative number to compare air volume. Calculated by multiplying casing width by casing height (in mm) and moving the decimal point two places to the left. Because this is an outside measurement it is affected by thick casings and tread base rubber (i.e. if two tires have an index of 25.0 the actual volume of the tire with the thicker casing/base rubber is lower than the thinner casing/rubber tire). This is the third version of the index. | | | | Weight:
in grams | All tires are weighed on a digital scale. All available samples are weighed | | | | Tread Durometer | Hardness or softness of the tread rubber in the ShoreA scale as reported by the tire company |
Digital Calipers 
Measuring the tire radius 
|
|
Last Updated on Tuesday, 30 June 2009 16:08 |
|
|
|
|
Page 3 of 3 |
Tech