A Track Racer's Reference:
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TECHNICAL SPECIFICATIONS

Upgrading components or just looking for service parts for your track bike? I hope you will find this information useful.

Cranks Bolt circle patterns; spindle length requirements; 'Q' factors
Bottom brackets Spindle lengths
Headsets Stack Heights
Stems Bore diameters
Handlebars Clamp diameters
Hubs Threading standards for axles and lockrings
Chainrings and Sprockets Distinguishing 1/8" from 3/32"
Chainline Chainring and Rear Sprocket Spacing
Time, Speed and Distance Useful Calculators
Gear chart Sequential Development

Unless otherwise noted, the following refers to the track-specific models from the various manufacturers only.


Cranks
  • Crank/spindle length requirements
    (Renders manufacturers' suggested chainline for contemporary rear track hubs with 120 mm over-locknut spacing)
    Crank Spindle length Spindle type
    Sugino 75 109 mm. Symmetrical
    Sugino Grand Mighty 109 mm. Symmetrical
    Campagnolo Record Track(current) 111 mm. Symmetrical
    Campagnolo 1051 Record Track and 4151 Super Record Track 109 mm. Symmetrical
    Shimano Dura-Ace 7710 109.5 mm. (Octalink splined attachment) Asymmetrical
    Shimano Dura-Ace 7600 109 mm. Symmetrical
    Shimano Dura-Ace EX Track 107 mm. (BSC)
    109 mm. (Italian)
    Symmetrical
    Shimano Dura-Ace Ten Pitch 107 mm. (BSC)
    109 mm. (Italian)
    Symmetrical
    Gipiemme 109 mm. Symmetrical
    Suntour Superbe Pro 109 mm Symmetrical
    Miche Primato Pista 107 mm. Symmetrical
    FSA Vigorelli Track 108 mm. (ISIS splined) Symmetrical

    N.B. - Be aware that differences in the tapers, overhangs and other variables of bottom bracket spindles may well affect chainline if you are mixing a crank from one manufacturer with the bottom bracket of another (even if the spindles are the same overall length). Not all fixed cups are alike either. If you must mix models and manufacturers' cranks and b/b's, you will frequently be best served by at least keeping both from within the same country of origin (i.e., Dura-Ace crank with Sugino 75 b/b; Super Record crank with Gipiemme b/b). By doing so, at least the taper shapes are more likely to be compatible. The results however, particularly with used cranks, are not consistently predictable. To hammer home the obvious though, it is almost always preferable to pair the crank with the exact bottom bracket model for which it was designed.

  • Bolt circle patterns (in mm.)
    Sugino 75 144
    Sugino Grand Mighty 144
    Campagnolo Record (current) 144
    Campagnolo 4141 Super Record Track and 1051 Record Track 144
    Campagnolo Record (pre-1972 or so) 151
    Shimano Dura-Ace (7710 series, with splined spindle joint) 144
    Shimano Dura-Ace (7600 series) 144
    Shimano Dura-Ace EX 151
    Shimano Dura-Ace 10 Pitch 122
    Gipiemme 144
    Miche Primato Pista 135
    Miche Primato Pista "Advantage" 144
    Suntour Superbe Pro 144
    Stronglight Speedlite Track 130
    Specialites T.A. "Compet" Piste 144
    Specialites T.A. Alize Piste and new style Alize Piste 130
    FSA Vigorelli Track 144
  • Determining bolt circle patterns - Unsure of what bolt circle pattern your crank (or chainring) has? It's hard to get an accurate measurement of the diameter of the circular pattern the fasteners trace (also frequently referred to as "P.C.D.", [pitch center diameter]). Instead, measure the distance (in a straight line) between the centers of two adjacent chainring fasteners. The table below gives the distance between fasteners for equivalent bolt circle patterns.

    pcd.jpg - 8.5 K
    144 bolt circle pattern 84.6 mm., hole center to hole center
    151 bolt circle pattern 88.8 mm., hole center to hole center
    130 bolt circle pattern 76.4 mm., hole center to hole center
    135 bolt circle pattern 79.4 mm., hole center to hole center
    110 bolt circle pattern 64.7 mm., hole center to hole center

  • Crankset 'Q' Factors -

    In addition to the bottom bracket drop of your frame and the proportions of the bodies of your pedals, pedal-strike issues can also be fractionally influenced by how wide from the centerline your cranks place the pedals. The table below gives the unoffical "Q-Factor" of some popular contemporary track cranks.

    (Measured from the outside faces of the left and right cranks at the pedal holes)
    Cranks
    Bottom Bracket
    'Q'
    Campagnolo Record Pista Campagnolo Record Pista 131 mm.
    Dura-Ace 7600 Dura-Ace 7610 139 mm
    Dura-Ace 7600 Dura-Ace 7600 137 mm.
    Sugino 75 Track Sugino 75 Track 139 mm.
    Dura-Ace 7710 Dura-Ace 7710 136 mm.
    Miche Primato Pista Miche Primato (107 mm.) 135 mm.

    The 'Q' measurements above are not specifications published by the various manufacturers. The numbers are taken from (handheld) measurements made in the shop on new (or nearly new) cranks paired with the corresponding bottom bracket from the same manufacturer. Accordingly, they should be used for rough comparative purposes only.


Bottom brackets

  • Spindle Lengths

First, see the caveat about playing mix 'em and match 'em with different models and manufacturers in the section on cranks above. Beware of the potentially inaccurate chainline that may result if you mix the spindle from one model with the cups from another (often even if they're from the same manufacturer). Fixed cups will vary in thickness from model to model and there's no consistency across various models of distances from spindle ends to bearing surfaces (overhang). There's more to getting an accurate chainline for a particular crank than just overall spindle length.

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Model Spindle Length Overhang
Shimano7700 (ball and needle bearings, adjustable bearing preload, Octalink splined spindle) 109.5 mm. Asymmetrical
Shimano 7710 (cartridge bearing, NJS type, Octalink splined spindle) 109.5 mm. Spindle not replaceable
Shimano 7600 109 mm. Symmetrical
Shimano 7610 (cartridge bearing) 109 mm. Spindle not replaceable
Shimano 7500 107 mm. (BSC). 109 mm (Italian) Symmetrical
Sugino 75 109 mm. Symmetrical
Sugino Superlap 109 mm. Symmetrical
Suntour Superbe Pro 109 mm. Symmetrical
Hatta R9400 109 mm. Symmetrical
Campagnolo Record Pista (cartridge bearing type, current) 111 mm. Spindle not replaceable
Campagnolo Record Pista (traditional cup/ball/spindle, adjustable bearing preload) 111 mm. Symmetrical
Campagnolo #1046 Record/Super Record Pista 109 mm. Symmetrical
Gipiemme Track 109 mm. Symmetrical
Mavic 610 110 mm. Symmetrical
Miche Primato 107 mm. Spindle not replaceable
FSA Platinum Pro Track 108 mm. (cartridge bearing, ISIS splined spindle) Spindle not replaceable


Headsets

  • Stack Heights for Track Headsets
Model Stack Height
Dura-Ace 7600 Track 31 mm. (33.5 with spacer)
Dura-Ace 7500 Track 33.5 mm
Hatta Super Deluxe 36 mm.
Campagnolo Record (current) 36.5 mm.
Campagnolo Record Pista 39 mm.
Campagnolo Super Record Pista (#4141) 36.0 mm.
Campagnolo Record Pista (#1040) 33.7 mm.
Suntour New Superbe Pro 35.5 mm.
Gipiemme Track 36 mm.


Track Handlebars

  • Handlebar Clamp Diameters
Model Material Clamp Diameter
Nitto (models B123AA, B125AA) aluminum 25.4
Nitto (models B123, B123Cr-Mo, B125, B127, B127Cr-Mo) steel 25.4
Deda Elementi Velocita steel 31.7
Deda Elementi Pista aluminum 31.7
3ttt Pista aluminum 25.8
Cinelli 67 aluminum 26.4
Cinelli Steel steel 25.4
Modolo Pista aluminum 26.0
Fiamme Pista aluminum 26.0
SR Track steel 25.4
Easton EC90 Track carbon fiber 31.8


Track Stems

  • Handlebar Clamp Bore Diameters
Model Material Clamp Diameter Fork Attachment
Nitto Jaguar (NJS) aluminum 25.4 Quill type, 22.2 mm
Nitto Jaguar (NJS) steel 25.4 Quill type, 22.2 mm
Nitto CT-80) steel 25.4 or 31.8 Threadless type, 1.125"
Deda Elementi Pista aluminum 31.7 Threadless type, 1.125"
Cinelli 2/A aluminum 26.4 Quill type, 22.2 mm
Cinelli Grammo Pista titanium 26.4 Quill type, 22.2 mm
Cinelli steel steel 25.4 Quill type, 22.2 mm
3ttt Pista (ARP2) aluminum 25.8 Quill type, 22.2 mm


Hub Axle and Lockring Threading

  • Thread standards for hub axles:

    Model Front Rear
    Campagnolo Record (includes all earlier track models) 9×26 10×26
    Shimano Dura-Ace 9×1 10×1
    Suntour Superbe Pro 9×1 10×1
    Suzue Pro-Max and Pro-MaxCF (models with standard cone/balls with fixed/fixed rear) 9x1 10x1
    Suzue Pro-Max SB (sealed bearing model with fixed/free rear) 3/8×26 3/8×26
    Suzue SIL-SP 5/16×26 3/8×26
    Miche Primato 9×1 10×1
    Formula TH-50, TH-51, TH52 9×1 10×1
    Formula TH-30, TH-31, TH32 9×1 10×1
    Dimension Track 9×1 10×1
    Dia-Compe Gran Comp 9×1 10×1
    Surly New Track 9×1 10×1
    Zipp T2 9×1 10×1
    OMAS 9×1 10×1
    Maillard 9×1 10×1
    Galli 9×1 10×1
    Gipiemme 9×26 10×26

  • Lockring threading standards:

    33.5 mm × 24 TPI Campagnolo, Gipiemme, Phil Wood, Miche
    1.29" × 24 TPI Shimano, Suntour, Formula, Dimension, Suzue, Surly, Zipp, Corima
    33.0 mm × 1 Mavic

    All track sprocket lockrings are left-hand threaded.


Chainrings and Sprockets
  • Determining Width - 1/8" or 3/32"?
Novice track riders who have acquired used equipment (or new bikes with components of uncertain pedigree) sometimes are unsure whether the rear sprocket and chainring on their bike is in the 1/8" or 3/32" format. If you've got access to a vernier caliper, measure the width of the chainring (or sprocket, as the case may be) at the base of the trough between any two teeth. If it measures 3 mm., it's for 1/2"x1/8" chains. If the measurement is 2 mm., it's for 3/32" chains.

No access to a caliper? Drape a length of new, or nearly new 3/32", 8-speed chain (same as road, but see note about 9 and 10 speed chains below) over the sprocket or chainring in question. Four or five links will usually be enough to tell. The rollers on a 3/32" chain will not fully drop into the troughs between the teeth of a 1/8" sprocket or chainring. It follows that if the 3/32" chain meshes properly with the teeth of the gear you're checking, you've got a 3/32'" one -- if the rollers ride up without fully engaging the teeth (don't force it), it's 1/8".

N.B. - For this test (or especially in actual use), never employ 9 or 10 speed chains - although they're oftern still nominally classed as 3/32", the internal dimensions of nine and ten speed chains are too narrow to pair with premium 3/32" track sprockets. Always use a chain designed for 8 (or fewer) speed operation which will usually be at least 7.1 mm wide. Ideally, it will be one made specifically for single-speed use.

The chain-mesh test isn't foolproof, particularly if the chain or sprocket isn't new - the best way is to measure it.



Chainline Specifications

(Data and graphic source: Campagnolo catalog n. 18)

Chainring Spacing
Bikes with 120 mm rear dropout spacing (the common standard since early '70s) 42.5 mm from centerline
Bikes with 110 mm rear dropout spacing 40 mm from centerline

Rear Sprocket Spacing
Rear Dropout Spacing Distance From Right Dropout (inside face) to Sprocket Seat on Hubshell
120 mm 24 mm
110 mm 21.5 mm


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For more information about track hub and sprocket chainline specifications, see also Sheldon Brown's page by clicking the button below:



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