2027 Trek Checkpoint ALR Gen 3 vs 2025 3T Exploro Ultra 700c
The 51 is the 3T Exploro Ultra 700c size closest to your XS Trek Checkpoint ALR Gen 3. We match frame stack and reach. This is a geometry comparison, not a fit recommendation; stem, spacers, handlebars and saddle setup also affect your riding position.
What changes on the 3T Exploro Ultra 700c
Compared with the Trek Checkpoint ALR Gen 3 in XS, the 3T Exploro Ultra 700c in 51 places the top of the head tube 3 mm lower and 18 mm further back, relative to the bottom bracket.
- Frame stack
- −3 mm
- Lower front end
- Frame reach
- −18 mm
- Shorter frame reach
- Wheelbase
- n/a
- One of the bikes has no number for this
- Head angle
- −1.7°
- Slacker: calmer steering
- Chainstays
- n/a
- One of the bikes has no number for this
The two frames
We can't draw these frames yet. The Trek Checkpoint ALR Gen 3 numbers we have for size XS are missing the seat angle. The numbers below still compare.
Geometry side by side
| Measurement | Trek Checkpoint ALR Gen 3 XS | 3T Exploro Ultra 700c 51 | Difference |
|---|---|---|---|
| Reach | 380 | 362 | −18 mm |
| Stack | 545 | 542 | −3 mm |
| Head tube angle | 71.2° | 69.5 | −1.7° |
| Effective top tube | 536 | not listed | |
| Chainstay length | 435 | not listed | |
| Wheelbase | 1025 | not listed | |
| BB drop | 78 | 79 | +1 mm |
| Standover | 735 | not listed | |
| Seat tube length | 445 | not listed | |
| Head tube length | 96 | 142 | +46 mm |
| Fork length | not listed | 375 |
Differences are the 3T Exploro Ultra 700c minus the Trek Checkpoint ALR Gen 3. Full charts: 2027 Trek Checkpoint ALR Gen 3, 2025 3T Exploro Ultra 700c.
Where each sits in its class
Trek Checkpoint ALR Gen 33T Exploro Ultra 700c
Each bike is ranked against the other gravel bikes on Quiver, on frame geometry alone. Not your hand position or ride feel.
What each ships with
The stock build of each bike's first listed trim. Parts that match are dimmed.
| Part | Trek Checkpoint ALR Gen 3ALR 3 Gen 3 | 3T Exploro Ultra 700cGRX 1X12 700c |
|---|---|---|
| Fork | Trek Checkpoint | Fango Ultra |
| Shifter | Shimano CUES 10 | Shimano GRX Di2 |
| Derailleur | Shimano CUES U6000 GS | Shimano GRX Di2 |
| Cassette | Shimano CUES LG300 | Shimano XT M8100 |
| Chain | Shimano LG500 | not listed |
| Crankset | Shimano CUES U60301 | Shimano GRX FC-RX600 |
| Tire | Bontrager Girona Comp | variable |
| Rim | Bontrager Paradigm 23 | not listed |
| Brake | Tektro C550 | Shimano GRX Di2 |
| Rotor | Tektro centerlock | not listed |
| Handlebar | Bontrager Elite Gravel | 3T variable |
| Headset | Bontrager Expander Plug | not listed |
| Saddle | Trek Verse | variable |
| Frame | not listed | 3T Exploro Ultra |
| Wheelset | not listed | Fulcrum Rapid 900 |
| Stem | not listed | 3T Apto Stealth |
| Seatpost | not listed | 3T round |
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