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AC Schnitzer
Adler
AJP
AJS
Aprilia
Ariel
Arlen Ness
ATK
Avinton / Wakan
Bajaj
Bakker
Barigo
Benelli
Beta
Big Bear
Big Dog
Bimota
BMS Choppers
BMW
Borile
Boss Hoss
Boxer
Brammo
Britten
BRP Cam-Am
BSA
Buell / EBR
Bultago
Cagiva
Campagna
CCM
CF Moto
Confederate
CR&S
Daelim
Derbi
Deus
DP Customs
Ducati
Excelsior
GASGAS
Ghezzi Brian
Gilera
GIMA
Harley-Davidson
Harris
Hartford
HDT USA
Hesketh
Hero
Highland
Honda
Horex
HPN
Husaberg
Husqvarna
Hyosung
Indian
Jawa
Junak
Kawasaki
KTM
KYMCO
Laverda
Lazareth
Lehman Trikes
LIFAN
Magni
Maico
Mash
Matchless
Matt Hotch
Megelli
Midual
Mission
Molot
Mondial
Moto Guzzi
Moto Morini
Mr Martini
MTT
Münch
MV Agusta
MZ / MuZ
NCR
Norton
NSU
OCC
Paton
Paul Jr. Designs
Peugeot
Piaggio
Revival Cycles
Rickman
Roehr
Roland Sands
Royal Enfield
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Sherco
Sunbeam
Suzuki
SYM
SWM
TM Racing
Triumph
Ural
Velocette
Vespa
Victory
Vilner
Vincent
VOR
Voxan
Vyrus
Walt Siegl
Walz
Wrenchmonkees
Wunderlich
XTR / Radical
Yamaha
Zero
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Triple Tree
Triple Tree ("triple clamp" (US) or "yoke" (UK)) attaches the fork tubes to the frame via steering head bearings, which allow the forks to pivot from side to side, and therefore steer the motorcycle. Most bikes have upper and lower triple trees, providing two solid clamping points that keep the fork tubes parallel whilst also connecting the forks to the frame via the steering head bearings.
With the tendency to employ fork legs with single action damping, fork triple trees need to be reinforced more than when the forks shared both damping roles, because the rigidity of the triple trees is relied upon to distribute the forces within the forks without flex.
The triple tree is closely related to rake and trail and by changing the triple tree you can actually adjust the rake and trail.
Triple trees have a dimension called off-set. It is the distance from the center of the fork tubes to the center of the neck pivot axis. It is an important factor in trail. The better manufacturers of raked triple trees reduce the off-set in order to increase trail in the final set-up.
With a rake of 5 degrees added to the frame and 5 degrees added to the triple tree and a reduction of off-set in the triple tree we have a bike with a longer wheel-base, a prettier front-end and a trail dimension close to the original.
Sources: Wikipedia, Seeger Cycle |
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