Definition Ekar
mason
Endurance
Definition Ekar is an alloy endurance road bike (2023), by Mason, from the Definition lineup. It is a strong match for a wide range of riders thanks to its fit flexibility, with a setup that gives you a balanced riding position, with a surface profile that is best matched to paved roads. On MatchBikes metrics, it scores well for good fit flexibility for dialing in rider position and a balanced aero profile for mixed road priorities. Compared with more specialized alternatives, the compromise is a firmer ride feel than comfort-first options and less emphasis on outright speed than speed-focused builds. Next step: compare this bike with other endurance models on MatchBikes.com.
Rating

Score Summary
Performance
Built for speed and efficiency
Fit
Dialed-in Fit & Comfort
Value
Specifications
General
Frame
Drivetrain
Wheels
Brakes
Cockpit
Seat
Geometry
| Measurement | 48cm | 50cm | 52cm | 54cm | 56cm | 58cm | 60cm | 62cm |
|---|---|---|---|---|---|---|---|---|
| Stack Reach Ratio | 1.45 mm | 1.43 mm | 1.45 mm | 1.48 mm | 1.5 mm | 1.5 mm | 1.52 mm | 1.54 mm |
| Bottom Bracket Height | 263 mm | 263 mm | 263 mm | 264 mm | 264 mm | 264 mm | 266 mm | 266 mm |
| Front Center | 580 mm | 590 mm | 595 mm | 600 mm | 610 mm | 615 mm | 620 mm | 630 mm |
| Rake | 45 mm | 45 mm | 45 mm | 45 mm | 45 mm | 45 mm | 45 mm | 45 mm |
| Trail | 69 mm | 66 mm | 66 mm | 66 mm | 66 mm | 63 mm | 63 mm | 60 mm |
| Stack | 527.1 mm | 538.3 mm | 547.8 mm | 560.5 mm | 574.7 mm | 586.1 mm | 594.1 mm | 615.1 mm |
| Reach | 364.7 mm | 375.6 mm | 377.5 mm | 378 mm | 383.3 mm | 389.7 mm | 391.8 mm | 400.5 mm |
| Top Tube Length | 514 mm | 527.8 mm | 532.4 mm | 546.5 mm | 556.1 mm | 576.3 mm | 581 mm | 596 mm |
| Seat Tube Angle | 74.5 ° | 74.5 ° | 74.5 ° | 73.5 ° | 73.5 ° | 72.5 ° | 72.5 ° | 72.5 ° |
| Seat Tube Length | 480 mm | 500 mm | 520 mm | 540 mm | 560 mm | 580 mm | 600 mm | 620 mm |
| Head Tube Angle | 71 ° | 71.5 ° | 71.5 ° | 71.5 ° | 71.5 ° | 72 ° | 72 ° | 72.5 ° |
| Head Tube Length | 120 mm | 130 mm | 140 mm | 155 mm | 170 mm | 180 mm | 190 mm | 210 mm |
| Chainstay Length | 415 mm | 415 mm | 415 mm | 415 mm | 415 mm | 415 mm | 415 mm | 415 mm |
| Wheelbase | 984 mm | 994 mm | 999 mm | 1004 mm | 1014 mm | 1019 mm | 1025 mm | 1035 mm |
| Bottom Bracket Drop | 73 mm | 73 mm | 73 mm | 71 mm | 71 mm | 71 mm | 70 mm | 70 mm |
| Standover Height | 736 mm | 751 mm | 765 mm | 782 mm | 799 mm | 813 mm | 828 mm | 848 mm |
| Wheels | 700 | 700 | 700 | 700 | 700 | 700 | 700 | 700 |




























































