Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

General Cycling Discussion Have a cycling related question or comment that doesn't fit in one of the other specialty forums? Drop on in and post in here! When possible, please select the forum above that most fits your post!

User Tag List

Reply
 
Thread Tools Search this Thread
Old 04-15-11, 10:41 AM   #1
highred
Newbie
Thread Starter
 
Join Date: Apr 2011
Bikes:
Posts: 2
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Sigma Sport BC 800

I have a Raleigh Mojave 5.0 with a 22" frame that I bought about 5 years ago. It came with a Sigma Sport BC 800 computer. The battery recently died and now I have to reset the computer all over again.

My question is, how do I determine the wheel size? In the Sigma Sport manual, it has numbers that do not correlate with any numbers on the bike tire. The tire is a Moto Raptor 28 x 49/52.

Thanks,

Rob Caldwell
highred is offline   Reply With Quote
Old 04-15-11, 05:48 PM   #2
ScottStr
Senior Member
 
ScottStr's Avatar
 
Join Date: Jul 2010
Location: Fort Worth, Texas
Bikes: Windsor Wellington 3.0
Posts: 256
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
The best wat to determine the wheel size is to measure it. Start with the valvestem at the bottom of the wheel on a mark, like a sidewalk expansion joint. Roll the bike forward until the valvestem is at the bottom again. Measure the distance between the starting and ending points. This makes up for differences in the actual size of your tire vs the standard for the stated size.
ScottStr is offline   Reply With Quote
Old 04-16-11, 11:47 AM   #3
highred
Newbie
Thread Starter
 
Join Date: Apr 2011
Bikes:
Posts: 2
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by ScottStr View Post
The best wat to determine the wheel size is to measure it. Start with the valvestem at the bottom of the wheel on a mark, like a sidewalk expansion joint. Roll the bike forward until the valvestem is at the bottom again. Measure the distance between the starting and ending points. This makes up for differences in the actual size of your tire vs the standard for the stated size.
I have tried your suggestion and my wheel size is 83 inches which converts to 2,108.2 MM. When I take this measurement to the BC800 Manual, I cannot determine what code to program into to BC800. I have attached the page of the manual. Maybe someone can decipher?

Thanks

Rob Caldwell

Attached Images
File Type: jpg BC800.jpg (97.3 KB, 11 views)
highred is offline   Reply With Quote
Old 04-16-11, 01:27 PM   #4
Looigi
Senior Member
 
Looigi's Avatar
 
Join Date: Dec 2010
Bikes:
Posts: 8,951
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
37-590 ???
Looigi is offline   Reply With Quote
Old 04-28-11, 11:03 AM   #5
ScottStr
Senior Member
 
ScottStr's Avatar
 
Join Date: Jul 2010
Location: Fort Worth, Texas
Bikes: Windsor Wellington 3.0
Posts: 256
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Rob,

If you want it to read out in KPH enter 2108. If you want MPH, enter 3109, which is 2108/1.61. I didn't realize that that model doesn't automatically convert. Mt BC1706 gives me the choice of KPH or MPH with the same wheel measurement.
ScottStr is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 11:06 AM.