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


Go Back   > >

Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 10-10-08, 10:43 AM   #1
nayr497
Senior Member
Thread Starter
 
nayr497's Avatar
 
Join Date: Nov 2004
Location: Nilbog
Bikes: How'd I get this many?
Posts: 1,561
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 27 Post(s)
spoke length question

Using spocalc, and measuring with Verniers here is what I got:

FRONT WHEEL = 292.1mm (both left & right, which seems, to make sense with a symmetrical hub, right?)

REAR WHEEL = 291.5mm right; 291.4mm left

1) These are track hubs. Does it make sense that the front spoke needs to be longer? (maybe just my measuring error, as that is a small difference)

2) What length spoke would you order for the front? 292mm, 291mm, 290mm?

3) What length spoke would you order for the rear? 291mm or 290mm?

Maybe I can just get all 290s...
nayr497 is offline   Reply With Quote
Old 10-10-08, 10:56 AM   #2
nayr497
Senior Member
Thread Starter
 
nayr497's Avatar
 
Join Date: Nov 2004
Location: Nilbog
Bikes: How'd I get this many?
Posts: 1,561
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 27 Post(s)
Well, now I'm officially confused. But, I guess this is why people say to measure everything twice.

I just re-entered my numbers into spocalc and got this:

FRONT = 292.1mm (both sides)

REAR = 292.2mm (both sides)

I guess it makes some sense though...old rims were Mavic CXP 22s, with ERD of 597 via Mavic site. New rims are Open Pro with ERD of 602 (did add three for spocalc). Old spokes were 288mm. If new spokes are measuring out to be 292mm, that is around 4-5mm difference in the ERD.

**Okay, I guess that leaves me with one question: what length spokes for front & rear - 292, 291, or 290?
nayr497 is offline   Reply With Quote
Old 10-11-08, 07:58 PM   #3
Silverexpress
Senior Member
 
Silverexpress's Avatar
 
Join Date: Sep 2005
Location: Berkley, Michigan
Bikes: Commuter(s), MTB(s), bent(s), folder(s) and a road.
Posts: 600
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
From what I've read, shorter is better. You don't want the spokes to go beyond the head of the nipples.
Silverexpress is offline   Reply With Quote
Old 10-11-08, 08:09 PM   #4
frankenmike 
mechanically sound
 
frankenmike's Avatar
 
Join Date: Jan 2007
Location: Dover, NH
Bikes: Indy Fab steel deluxe, Aventon cordoba, S-works stumpy fsr, Masi vincere, 92 Hardrock commuter, Dahon mu uno, Outcast 29
Posts: 1,428
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 26 Post(s)
I usually try to fudge on the short side, for reasons above. Bottom line though, you won't really know until you lace them up.
frankenmike is offline   Reply With Quote
Old 10-11-08, 08:28 PM   #5
Ex Pres 
#39
 
Ex Pres's Avatar
 
Join Date: Dec 2007
Location: Mountain Brook, AL
Bikes:
Posts: 6,557
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 135 Post(s)
Me, I'd buy 291 all around, unless I got a great deal on some 290s
__________________
72 special CNC & Frejus (ala Legnano) / 73 Holdsworth Record /74 Italvega NR /80 Ranson & an unknown French /83 Trek 620 (nee 600) /c'85 Gianni Motta /90 Miele Gara /03 Casati Dardo /08 BF IRO (fixed/SS) /09 Dogma FPX magnesium /10 Vassago Fisticuff (IGH)

For Sale: Peugeot PXN10 & c'88 Guerciotti GLX f&f
Ex Pres 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 09:31 AM.


 
  • Ask a Question
    get answers from real people!
Click to start entering your question.
I HAVE A QUESTION