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Hello All,

I just read the post below regarding alum and ti bolts etc., and I read the fact sheet provided as a previous feature article - they both helped quite a bit. The fact sheet provided a lot of the info I was missing - mainly the sizes of many of the bike bolts. When you need to know the sizes of bolts not listed on the fact sheet in the post below, do you just call the manufacturer (or can you acurately measure them yourself with a simple ruler etc?)? I need bolt kits, aluminum (alum is OK, correct?), for my '04 hope mono minis and rolhoff hub. It looks as of the fact sheet gave all the other sizes needed. Also, how do you know which screw head (not size, but actual name of the head) to buy and what they are called (button, flanged ect.?)

Thanks,

Stephen
 

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swalters said:
Hello All,

I just read the post below regarding alum and ti bolts etc., and I read the fact sheet provided as a previous feature article - they both helped quite a bit. The fact sheet provided a lot of the info I was missing - mainly the sizes of many of the bike bolts. When you need to know the sizes of bolts not listed on the fact sheet in the post below, do you just call the manufacturer (or can you acurately measure them yourself with a simple ruler etc?)? I need bolt kits, aluminum (alum is OK, correct?), for my '04 hope mono minis and rolhoff hub. It looks as of the fact sheet gave all the other sizes needed. Also, how do you know which screw head (not size, but actual name of the head) to buy and what they are called (button, flanged ect.?)

Thanks,

Stephen
I use Al for aluminum, shorter than Alum.... :D

Go back to this thread:
http://forums.mtbr.com/showthread.php?t=33616

and look at the the picture of the bolt gauge. That is really the easiest way to tell the bolt sizes. You could also do it with a metric ruler though. Calling the manufacturer would be a pain, most likely cost money, and they may not even know the size.

As far as the head shape goes, I believe that both Redmist and Racebolts offer pictures and descriptions of all the head types on their websites.
 

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Most can be easily measured once you get the dia right. Reference bolts:Most any caliper to frame bolt is a 6mm(takes a 5mm allen wrench). Shifter pod pinch bolts are 6mm in dia. Rear shock bolts are most always 6mm bolts also. Most stem bolts are 6mm also, but some can be 5mm(RaceFace Deus, Ritchey WCS-but only the face plate, etc). Seatpost clamps are usually 6mm, but some are 5mm as well. 5mm bolts are used for the front derailier frame mnt(or is that a 4mm LOL!). The bigass breakdown allen on the bottom of most RS forks is an 8mm allen. Use these for comparison. Get it? After you know the dia, all ya need to do is the math for the thread length. 1"=25mm or there abouts. Sooo....you just gotta think in 5th's. 5mm times 5=1". For instance...my upper NRS shock bolt is around 2.6" x 25mm=65mm. Most caliper to frame bolts measure about 3/5ths of an inch...or 15mm. Avid CPS bolts(6mm) are about 1" long..or 25mm=6x25mm. Get it? Think in 5ths of an inch, and ya got it beat once you know the dia.

After all that, its only the material to figure for what ap.
 
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