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 07-05-00, 07:52 PM #1 Gax Newbie Thread Starter   Join Date: Jul 2000 Bikes: Posts: 2 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) Picked up a bike computer today. The calibration instuctions were pretty straight-forward, so my wife and I got out in the drive and I rolled off one revolution. We measured, came up with 80 inches, multiplied times 25.4 to get a result of 2032mm. My tire is the IRC Fiesterra, 26 x 1.95. The instructions that came with my 'puter list some "popular tire brands" and their calibrations. Here is an excerpt from the table: ATB 26 x 1.40 = 1995mm ATB 26 x 1.50 = 2030mm ATB 26 x 1.75 = 2045mm ATB 26 x 2.00 = 2099mm I wasn't sure if "ATB" was a brand or a type; my search for "atb" on the MTBReview site revealed only a single reference ("Panaracer Duster II ATB tire"). But -- please correct me if I'm wrong -- numbers are numbers. If an "ATB 26 x 1.75" translates to a circumference of 2045mm and an "ATB 26 x 2.00" translates to 2099mm... shouldn't my IRC Fiesterra lie somewhere between 2045mm and 2099mm, instead of the 2032mm that my measurement produced? Pardon my newbie ignorance, and thanks in advance!
 07-05-00, 11:30 PM #2 RoadRash Senior Member   Join Date: Jan 2000 Bikes: Posts: 85 Mentioned: 1 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) How i do it... Gax, can you put your number (2032mm) into the computer over riding the internal setings? If so, this is how i do it, get some chalk, and mark up your tire, now roll the bike so it leaves 4 chalk marks on the ground, measure between the 1st and 4th chalk mark, and divide by 3 (3 rotations of the tire). This will get you a more acurate count on the size of the tire. Ds for ATB(all terrain bike) thats just another word for MTB(mountain bike). The factory measurements will probly be a bit different from yours. You may want to change your computer as your tire wares down, as you will loose a few mm, and your computer will show numbers higher then what you really did (however not much at all, maybe .05% if that) Sorry for the bad spelling! my spell checker isnt working right now, and im horible! Hope this helps.
 12-26-08, 10:44 AM #3 ed  .     Join Date: Oct 2005 Location: The Summit of Lee Bikes: Hecklah Posts: 10,940 Mentioned: 1 Post(s) Tagged: 0 Thread(s) Quoted: 3 Post(s) RESURRECTED BIZNATCHES!!! Happy Hannuka Sorry...I'm really, really bored. __________________ Danny Mac vids 29er FAQ's Beefcake Hardtails VidYo's Good Deals, Blowouts Last edited by ed; 12-26-08 at 10:54 AM.
 12-26-08, 10:49 AM #4 lanfarm Gotta Catch em all!     Join Date: May 2008 Location: Mississauga, Ontario Bikes: 2008 Giant Rincon Posts: 456 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) woooooooooooooooooooooo
12-26-08, 02:01 PM   #5
kenhill3
use your best eye

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 Originally Posted by chelboed Sorry...I'm really, really bored.
Geez, I guess! Ed, don't you have some toys to play with or somethin'?
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12-26-08, 10:17 PM   #6
deraltekluge
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 Originally Posted by Gax I wasn't sure if "ATB" was a brand or a type; my search for "atb" on the MTBReview site revealed only a single reference ("Panaracer Duster II ATB tire").
Ah, but did you google the world?

All-Terrain Bicycle
(ATB) A bicycle with straight handlebars, sturdy fat tires, and wide-range gearing designed for off-road use. Also called Mountain Bike.

Seriously, try making your measurement again, over several revolutions of the tire, with your weight on the bike.

Last edited by deraltekluge; 12-26-08 at 10:20 PM.

12-27-08, 01:20 AM   #7
kenhill3
use your best eye

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 Originally Posted by deraltekluge Ah, but did you google the world? All-Terrain Bicycle (ATB) A bicycle with straight handlebars, sturdy fat tires, and wide-range gearing designed for off-road use. Also called Mountain Bike. Seriously, try making your measurement again, over several revolutions of the tire, with your weight on the bike.
deraltekluge-

I don't think the OP is gonna hear your advice- his posting was from the year 2000.
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 12-27-08, 09:58 AM #8 deraltekluge Senior Member     Join Date: Sep 2006 Bikes: Kona Cinder Cone, Sun EZ-3 AX Posts: 1,195 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) Yeah, I just noticed. What's going on with people resurrecting old threads? I've seen a bunch of old stuff lately, but the dates on this one slipped by me.
12-27-08, 10:17 AM   #9
rankin116
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 Originally Posted by kenhill3 deraltekluge- I don't think the OP is gonna hear your advice- his posting was from the year 2000.
In that same year secret documents were revealed about why Baskin Robbins stopped at 31 flavors. Flavor 32 tasted too much like Gary Coleman.

12-27-08, 11:39 AM   #10
ed
.

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Quote:
 Originally Posted by deraltekluge Yeah, I just noticed. What's going on with people resurrecting old threads? I've seen a bunch of old stuff lately, but the dates on this one slipped by me.
I thought I made it obvious that the new life I breathed into this old thread was just hot air.