自行车链条线设计参数.doc

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完满版本自行车链条线设计参数
完满版本自行车链条线设计参数
AllAboutBicycle
Chainline
Chainline
,bothsprocketsshouldbeinthesameplane,"perfectchainline".
Inthecaseofderailergearedbicycles,thechainlineisnotperfectin
,theworsethemechanicalefficienty
ofthedrivetrain.
"Correct"chainlineforaderailersystemisamatterofopinion,and
"simple"answerstothequestionofwhatconstitutesproperchainline:
1.
Oneview
isthat
themiddleof
the
clustershould
line
upwiththe
middle
chainring
(orhalf-waybetweenthetwo,inthecaseofa
double.
2.
Fromthe
parts
manufacturers'
point
of
view,
thechainline
depends
onthediameter
ofthe
seattubewherethe
front
derailer
mounts.
Forfatterseattubeswherethefrontderailerisfarthertothe
right,derailermanufacturerswantthechainlinetobefarther
tothe
right
also,
because
their
main
priority
is
shifting
performance,
andtheir
front
derailers
haveanoptimal
chainline

aconcerninthecaseofbicycleswithindexedfrontshifting.
Fromtherider'spointofview,,consideraroadtriplevsamountainbiketriple:
?Witharoadtriple,youmostlyusethetwobiggerrings,thegrannyisonlyoccasionallyused,,havingthecranksclose-inisgood,becauseitincreasestheusabilityofthebigring.
Withamountainbike,thesmallringisusedmuchmoreoften,andmustoftenbeusedwithfairlysmallsprocketstoavoidhaving
,amoreoutboardchainwheelpositionisoftenpreferable.
ChainlineStandards:
ApplicationDimensionNotes
Shimanospec,measuredtothemidpointbetweentherings.
,thisputstheinnerat41
mm,theouterat46mm.
RoadTriple45Shimanospec,measuredtothemiddlering.
Shimanospec,measuredtothemiddlering.
-,butforframeswithoversizedseattubes,the
MTBTriple
longerdimensionmaybeneeded,becausethefattubeplacesthederailermechanismfarthertotheright.
Track/Coaster
Brake
Olderbikeswith110spacingwouldbeonthesmallerendof
Traditional
-42
One-Speed
thisrange
mm
Mostinternal
Newerbikeswith120mmspacingnormallyuse42mm
gearhubs
Singlespeed
WiderchainlineneedforchainstayclearanceonMTBs.
MTB
52mm
Rohloff
54mm
Thisisclosetothechainlineoftheouterring
Speedhub
(58mm
ofatypicalMTBtriple
完满版本自行车链条线设计参数
完满版本自行车链条线设计参数
完满版本自行车链条线设计参数
w/13
tooth)
Singlespeed
WhiteIndustriesENOhubsusethischainline,whichlinesup
withthemiddlepositionofatypicalMTBtriple.
MTB

Alternate
It'salsofairlyclosetotheouterpositionofatypical"road"
double.
ChainlineMeasurement-Front
Chainlineismeasuredfromthecenterlineoftheframetothecenterofthechain.

,,measuretothehalfwaypointbetweenthetworings.
完满版本自行车链条线设计参数
完满版本自行车链条线设计参数
完满版本自行车链条线设计参数
ChainlineAdjustment-Front
Ifyouneedtoadjustthefrontchainline,thereareseveraldifferentoptionstoaccomplishit:
ChangetheBottomBracket
Mostbottombracketsmadesincethemid-'90saresymmetrical,,say,4
shorter,itwillmovethechainline2mmtotheleft,becauseitwillbe2mmshorteroneachside.
Ifyougothisroutetoanarrowerchainline,makesurethattherewon'tbeaclearanceproblembetweentheframeandthecrankorchainring.
BottomBracketSpacer
Ifyouneedtoincreasethechainline(movethechainringtotheright)youcanusuallyaddaspacerwasherbetweentheright-sidebottombracketmountingring(orcup)-,Idon'tknowofanysourceforaspacerthatwillfitanItalian(36mm)bottombracket.
?
ChainringSpacers
Forasinglechainring,youcanaddspacersbetweenthechainringandthecrankspider.
Ifyourchainringismountedontheoutsideofthespider,'smounteedontheinsideofthespider,youcanmoveittotheleftasshown.
.
完满版本自行车链条线设计参数
完满版本自行车链条线设计参数
完满版本自行车链条线设计参数
Suitablespacersareavailablein1,2,
mayneedtouselonger"double"stackbolts,especiallyforthe3mmsize.
PhilWoodBottomBrackets
PhilWoodBBsaresuperquality,availableinmanydifferent
lengths,andtheyalsofeaturetheabilitytoadjustthechainlineoverarangeofseveralmillimeters.
PhilWoodstuffisexpensive,butit'stheVeryBest.
ChainlineMeasurement-Rear(Forbikesthatdo
notusederailergearing)
Tomeasurerearchainline:
Measuretheframespacing(ortheover-lock-nutdimensionofthehub,whichshouldbethesame.)(Example:120mm)
Dividetheresultinhalf.(Example:60mm)
Measurethedistancefromtheinsideoftherearforkend(ortheoutsideoftheaxlelocknut)tothemiddleofthesprocket.(Example:18mm)
Subtractthedropout-to-sprocketspacing(Example:18mm)fromthehalf-over-lock-nutdimension(Example:60mm)todeterminetheactualrearchainline(Example:42mm)
Forfixed-gearorothersingle-speedhubs,seebelowforachartofdifferenthubsandsprockets.
Withthischartyoucancalculatetherearchainlinebysimpleaddition.
FixedSprocketsandSingleFreewheels
完满版本自行车链条线设计参数
完满版本自行车链条线设计参数
完满版本自行车链条线设计参数
Ihavemeasuredaselectionoftracksprockets,singlefreewheelswithrespecttochainline(unitsaremillimeters.)The"Chainline"isthedistancefromthemmountingshouldertothecenterlineofthesprocketteeth.

andhubs
column
完满版本自行车链条线设计参数
完满版本自行车链条线设计参数
完满版本自行车链条线设计参数
Tofiguretheactualchainlineforagivencombination,addthenumber
fromthe"chainline"columnofthesprocketorfreewheeltothecorrresponding"chainline"columnofthehubchosen.
Fixed(Track)Sprockets
Model/TypeNominalChainlineMeasuredTotalThread
完满版本自行车链条线设计参数
完满版本自行车链条线设计参数
完满版本自行车链条线设计参数
Width
(From
width
thickness
Thickness
Shoulder)
Campagnolo
3/32"




Campagnolo
1/8"




.
3/32"




.
1/8"




MicheQuick
3/32"




ChangeSplined
MicheQuick
1/8"




ChangeSplined
PhilWood
3/32"




PhilWood
1/8"




Shimano
3/32"




Dura-Ace
Shimano
1/8"




Dura-Ace
Soma
3/32"




Soma
1/8"




SuginoGigas
1/8"




SunTourSuperbe
3/32"




SunTourSuperbe
1/8"




SurlyNew(2005)
3/32




完满版本自行车链条线设计参数
完满版本自行车链条线设计参数
完满版本自行车链条线设计参数
SurlyNew(2005)
1/8"

3


SurlyOld
3/32




SurlyOld
1/8"




SingleSpeedFreewheels
Chainline
Model/Type
NominalWidth
(From
Measuredwidth
Shoulder)
ACS
3/32"


Shimano
3/32"


Shimano
1/8"


Tristar
1/8"


White
3/32"


Industries
SingleSpeedandFixedGearHubs
OLD
Chainli
Model/Ty
Track/M
ne
Left
Right
Drillin
Adjustable
pe
TB
Spaci
Centerto
Side
Side
gs
?*
ng
Shoulder
Ambrosio
large
Track
120
?
36
Fixed
Fixed
32
flange
Campagn
Track
120
Yes
36
Plain
28,32,
olosmall
Fixed
36
flange
完满版本自行车链条线设计参数
完满版本自行车链条线设计参数
完满版本自行车链条线设计参数
2002
Campagn
olo
28,32,
C-Record
Track
120
Yes

Plain
Fixed
36
Large
flange
120,
GoldTec
Track
130,
Yes

Fixed
Fixed
32,36
135
.
Track
120
No

Fixed/Fr
32
ee
Kogswell
MTB
135
No

Fixed
Fixed
32
Miche
Track
120
Yes

Plain
Fixed
28,32,
36
On-One
Full
MTB
135
No

Plain
Free
32,36
Monty
PhilWood
120,
Plain
28,32,
Track
126,
No

Fixed
Fixed
Track
36
130
Free
PhilWood
Plain/Fr
Fixed/Fr
.
MTB
135
No

32,36
ee
ee
Off
Shimano
28,32,
Dura-Ace
Track
120
Yes

Fixed
36
7700
Shimano
28,32,
Dura-Ace
Track
120
Yes

Fixed
36
7700
Small
完满版本自行车链条线设计参数
完满版本自行车链条线设计参数
完满版本自行车链条线设计参数
Flange
Shimano
Dura-Ace
28,32,
7600
Track
120
Yes

Fixed
Large
36
Flange
Sovos
Track
112
Yes

Free
Fixed
36
Spot
MTB
135
No

Plain
Free
28,32,
36
Surly
Track
120
Yes

Free
Fixed
32
Track
Surly1x
MTB
135
Yes

Free
Fixed/Fr
Drillin
1
ee
gs
Suzue
Track
117-12
Yes

Free
Fixed
28,32,
Basic
0
36
Suzue
Promax
Track
120
Yes

Free
Fixed
28,32,
(cartridge
36
)
Suzue
28,32,
Promax
Track
120
Yes

Fixed
Fixed
36
NJS
Van
MTB
135
No

Free
Fixed
32
Dessell
White
Track/M
126,
28,32,
Industries
130,
No

Free
Fixed
TB
36
ENO
135
ChainlineAdustement-Rear
完满版本自行车链条线设计参数
完满版本自行车链条线设计参数
完满版本自行车链条线设计参数
Thereareanumberofoptionsforadjustingrearchainlineonbikeswithasinglerearsprocket:
完满版本自行车链条线设计参数
完满版本自行车链条线设计参数
完满版本自行车链条线设计参数
AxleRe-Spacing/Re-Dishing
Thisistheusualwaytogoforconvertingbikesfromamulti-speedderailersetuptoasingle-speedfixed-gearorfreewheeldrive.
Thespacersarelocatedjustbehindtheouterlocknuts,between
thelocknuts
andthe
cones(or
the
bearing
mounting
nuts,
if
your
hubusescartridgebearings.)Youwillneedconewrenchesanda
generalunderstandingof
hubbearingadjustmenttodothisjob.
Assumingthe
rear
hub's
spacing
already
matches
your
frame's
spacing,you
cantake
spacerwashersfrom
onesideof
thehuband
movethemtotheother
side,
thusshifting
theentire
hubfromside
-speed
freewheel,thereisusuallyaratherthickspacerontheright
(freewheel)side
of

astackof
thinnerspacer
washersthataddupto
the
sameoverall
thickness,
thendistribute
the
washersfromside
toside
asneededto
get
the
chainlinewhereyouneedittobe.
Onceyouhavedonethis,you'llneedtore-dishthewheelby
adjustingthe
spokes.
Thisisa
bit
oftrouble,but,inthecasee
ofmulti-to-single-speed
conversion,
the
re-dishing
actually
resultsinmakingthewheel
muchstrongerthanitwas.
Ifyou'reusingaflip-flophub,re-spacingtheaxlewilllikely
maketheflip-flopfeatureunsuable,unlessyoualsouseadoublechainringinfront.
SprocketDishing
Mostinternal-gearhubshave"dished"sprocketsthatcanbeinstalledeitherdishedin,orout,providingachoiceoftwodifferentchainlines.
Fixed-gearsprocketsareusuallyintendedtobeinstalledwiththeflangefacinginward,,inmanycases,itispossibletoflipafixed-gearsprocketoverifyouneedtomovetherearchainlinetotheleft.
完满版本自行车链条线设计参数
完满版本自行车链条线设计参数
完满版本自行车链条线设计参数