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Specialties T.A. 6-Bolt Chainring: 45t x 152mm Massed Start REF 106

$49.99 $29.99
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Product Description

This tough to find 6-pin pista chainring, to fit on a "professional" adapter.  The adapters were either REF. 173 for 3 bolt crank arms, or REF. 175 for 5 bolt cranks.  This is the Ref 106 model, identified by the countersunk chainring bolt holes (the 104 was identical but without countersinks).  The purpose of this was to allow for easy chainring switches without removing pedals, as this was in the 1960's when most TA chainrings had too small an opening to fit over pedals (like the Pro 5 Vis rings).

This one somehow has zero logos (we have others with both the old logo and the new logo)


Excellent lightly used shape.  Teeth show minimal wear.  Light scratches throughout.


  • BCD: 6 bolt, 152mm
  • 45t
  • 3/32"
  • Alloy

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