Salut,
S'il y a des amateurs pour la visserie des derailleurs Campa, Shimano ou autre quicaillerie:
M-stands for Metric
Number after M-stands for thread diameter and head height
To calculate head diameter you take the number following M, divide it by 2, and add the original number plus one half M plus 1 for head diameter.
Head diameter = M + (M/2) + 1, where M represents the number following M.
Example:
M6
Thread diameter = 6mm
Head height = 6mm
Socket = 5mm
Head width 6+(6/2)+1=10mm
Length of bolt is always from the bottom of the head to the bottom of the screw, head height is not included, unless otherwise noted.
Heres my list of bolts for tuning, maybe it will save some people some time. If anyone has anything to add please post it.
Campy Record
Front Deraileur
Limit screws M3x16mm X2 (Button)
Pivot screw M4x6mm (Button)
Cage Screw M4x6mm (Button)
Mount bolt M5x14mm (socket head)
Pinch bolt M6x8mm (Tapered socket head)
Rear Deraileur
Limit screws M4x14mm X2 (modified button)
Pinch bolt M6x8mm (Tapered socket head)
Ergo Shifter
Pivot fixing bolt M4x22 (Socket head)
Ergo Mount M6x10-12mm(Brake mount nut)
Brakes
Pinch bolt M6x8mm (socket head)
Misc Campy
Downtube braze-on M5x8mm (button head)
Cable guide M5x6-8mm(button head)
Crank bolts M8x24mm
Dura Ace
Front Deraileur
Pinch bolt M5x10mm (tapered or socket head)
mount bolt M5x14mm (socket head)
Limit screws M4x10mm (tapered socket head)
Rear Deraileur
Pinch bolt M5x8mm (TSH, or socket head)
Barrel adj M5x12mm (specialty)
Pulley bolts M5x12mm (Flat head socket/shoulder)
B-screw M4x12mm (button head modified)
Limit Screw M4x12mm (button head modified)
Brakes
Pad mount bolt M5x12mm (oversize button head)
Shoe bolt M4x6mm (set, BH, SH, TSH)
EC bolt M4x10mm (TSH)
Pinch bolt M6x8mm (SH,TSH)
QR mount M4x5mm (SH)
2nd pivot lock M4x4mm (Set)
Main pivot lock M4x4mmX2(Set)
Arm spring adj M4x6mm (Set)
Arm Bolt(Front) M6x6mm (Set)
Arm Bolt(Rear) M6x18mm (Set)
Misc Dura ace
Downtube brz-on M5x8mm (BH)
Cable guide M5x6-8mm(BH)
Crank Pinch boltM6x16mm (SH)
Specialty dura ace
BAxle rear derailleur
Plate Axle rear derailleur
Other bolts:
Aheadset top caps M6x30mm (SH)
Syntace stem
Front clamp M5x16mm(SH)
Steerer mount M5x12mm(SH)
Ritchey WCS stem
All bolts M5x16mm (SH)
I updated the list with this, I went off of memory but I'm pretty sure these are all right. The last column is original/replacement.
for more savings carbon bolts can be used in place of almost all aluminum bolts. But do not substitue for the Ti ones. And there are some exceptions such as if using power cordz, Ti pinch bolts work better than aluminum
Some bolts such as set type are very hard to find in any form other than steel, so some modifications may have to be made to bh and tsh to fit them.
Campy Record
Front Deraileur
Limit screws M3x16mm X2 (Button) steel/aluminum
Pivot screw M4x6mm (Button) sttel/aluminum
Cage Screw M4x6mm (Button) steel/aluminum
Mount bolt M5x14mm (socket head) Ti/aluminum
Pinch bolt M6x8mm (Tapered socket head) Ti/aluminum
Rear Deraileur
Limit screws M4x14mm X2 (modified button) steel/aluminum
Pinch bolt M6x8mm (Tapered socket head) Ti/aluminum
Ergo Shifter
Pivot fixing bolt M4x22 (Socket head) Steel/aluminum
Ergo Mount M6x10-12mm(Brake mount nut) steel/Ti
Brakes
Pinch bolt M6x8mm (socket head) Ti/aluminum
Misc Campy
Downtube braze-on M5x8mm (button head) Steel/aluminum
Cable guide M5x6-8mm(button head) Steel/aluminum
crank bolts M8x24mm Steel/aluminum
Dura Ace
Front Deraileur
Pinch bolt M5x10mm (tapered or socket head) steel/aluminum
mount bolt M5x14mm (socket head) steel/aluminum
Limit screws M4x10mm (tapered socket head) aluminum/aluminum
Rear Deraileur
Pinch bolt M5x8mm (TSH, or socket head) steel/aluminum
Barrel adj M5x12mm (specialty) steel/aluminum
Pulley bolts M5x12mm (Flat head socket/shoulder) steel/aluminum
B-screw M4x12mm (button head modified) aluminum/aluminum
Limit Screw M4x12mm (button head modified) aluminum/aluminum
Brakes
Pad mount bolt M5x12mm (oversize button head) steel/ti
Shoe bolt M4x6mm (set, BH, SH, TSH) steel/aluminum
EC bolt M4x10mm (TSH) steel/aluminum
Pinch bolt M6x8mm (SH,TSH) steel/aluminum
QR mount M4x5mm (SH) steel/aluminum
2nd pivot lock M4x4mm (Set) steel/aluminum
Main pivot lock M4x4mmX2(Set) steel/aluminum
Arm spring adj M4x6mm (Set) steel/aluminum
Arm Bolt(Front) M6x6mm (Set) steel/aluminum
Arm Bolt(Rear) M6x18mm (Set) steel/Ti
Mounting nut M6xvaries(specialty) steel/aluminum
Mounting bolt M6xvaries(specialty) steel/Ti
Misc Dura ace
Downtube brz-on M5x8mm (BH) steel/aluminum
Cable guide M5x6-8mm(BH) steel/aluminum
Crank Pinch boltM6x16mm (SH) steel/Ti
Specialty dura ace
BAxle rear dearileur steel/Ti
Plate Axle rear deraileur steel/Ti
Other bolts:
Aheadset top caps M6x30mm (SH) steel/aluminum
Syntace stem
Front clamp M5x16mm(SH) steel/ti
Steerer mount M5x12mm(SH) steel/ti
Ritchey WCS stem
All bolts M5x16mm (BH) steel/Ti
Here's a few examples of weight savings by tuning
Campy front der.
Stock braze on 71grams/ tuned 63grams/ with carbon pinch and mount bolts 61grams/
Campy Rear der.
Stock 187/tuned 185
DA front der.
Stock braze on 74grams/tuned 70grams/ with carbon pinch and mount bolts 68grams
DA Rear Der.
Stock 182/Tuned 176(did not replace either axle pivots)/with carbon pinch, and pulley bolts 173grams
DA rear brake
Stock 154/Tuned 139grams(everything except main mounting bolt)
Crank bolts
Campy steel 16grams per bolt
Ti 7grams per bolt
Aluminum 5grams per bolt
Chain ring bolts set of 5
Steel 25grams
Aluminum 10grams
Liste compilee par Madcow et publie sur le forum Weightweeinies.
Ciao,
