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  Specialized Tarmac Disc 2020
 		Octane One Gridd 2019
  Specialized Tarmac Disc
2020: 61
Octane One Gridd
2019: XL
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Choose Baseline
Reach 488 378
Stack 693 717
Top Tube (effective) 688 574
Seat Tube C-T 662 573
Head Angle 80 64
Seat Angle 61 77
Head Tube 231
Chainstay 488 487
Wheelbase 1072 944
Front Centre 702
Standover 719
BB Drop 67 -83
BB Height 291
Fork Rake / Offset 51
Trail 48
Fork Length (A2C) 430
Wheel Size 700c
Seatpost Length 331
Handlebar Width 470
Stem Length 129
Crank Length 157
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  Specialized Tarmac Disc
2020: 61 		Octane One Gridd
2019: XL
Image showing geometry measurements

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