The geometry chart below applies to all Specialized Tarmac SL8 frames from the following:
- Years: 2023
- Models: S-Works, Pro, Expert
- Frame material: FACT 12r carbon (S-Works), FACT 10r carbon (Specialized)
| Frame Size | 44 | 49 | 52 | 54 | 56 | 58 | 61 |
|---|---|---|---|---|---|---|---|
| Suggested Rider Height (cm) | 142 to 155 | 155 to 163 | 163 to 170 | 170 to 175 | 175 to 180 | 180 to 188 | 188 to 196 |
| Suggested Rider Height (ft) | 4’8″ to 5’1″ | 5’1″ to 5’4″ | 5’4″ to 5’7″ | 5’7″ to 5’9″ | 5’9″ to 5’11” | 5’11” to 6’2″ | 6’2″ to 6’5″ |
| Stack (mm) | 501 | 514 | 527 | 544 | 565 | 591 | 612 |
| Reach (mm) | 366 | 375 | 380 | 384 | 395 | 402 | 408 |
| Top Tube, Horizontal (mm) | 496 | 509 | 531 | 541 | 563 | 577 | 595 |
| Seat Tube (mm) | 433 | 445 | 456 | 473 | 494 | 515 | 545 |
| Seat Tube Angle | 75.5º | 75.5º | 74º | 74º | 73.5º | 73.5º | 73º |
| Head Tube (mm) | 99 | 109 | 120 | 137 | 157 | 184 | 204 |
| Head Tube Angle | 70.5º | 71.75º | 72.5º | 73º | 73.5º | 73.5º | 74º |
| BB Height (mm) | 266 | 266 | 266 | 268 | 268 | 268 | 268 |
| BB Drop (mm) | 74 | 74 | 74 | 72 | 72 | 72 | 72 |
| Fork Trail (mm) | 71 | 63 | 58 | 58 | 55 | 55 | 52 |
| Fork Length (mm) | 370 | 370 | 370 | 370 | 370 | 370 | 370 |
| Fork Offset (mm) | 47 | 47 | 47 | 44 | 44 | 44 | 44 |
| Front Center (mm) | 572 | 574 | 577 | 579 | 592 | 606 | 613 |
| Chainstay (mm) | 410 | 410 | 410 | 410 | 410 | 410 | 410 |
| Wheelbase (mm) | 970 | 973 | 975 | 978 | 991 | 1006 | 1013 |
| Standover Height (mm) | 723 | 735 | 746 | 768 | 786 | 808 | 834 |
| Stem Length (mm) | 80 | 100 | 110 | 70 | 90 | 100 | 110 |
| Seatpost Length (mm) | 300 | 380 | 380 | 300 | 300 | 380 | 380 |