2024 Lauf Seigla Core vs 2022 Surly Cross-Check Flat Bar
The 46 is the Surly Cross-Check Flat Bar size closest to your S Lauf Seigla Core. 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 Surly Cross-Check Flat Bar
Compared with the Lauf Seigla Core in S, the Surly Cross-Check Flat Bar in 46 places the top of the head tube 9 mm lower and about as far forward, relative to the bottom bracket. Its wheelbase is 28 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- −9 mm
- Lower front end
- Frame reach
- −2 mm
- About the same reach
- Wheelbase
- −28 mm
- Shorter: quicker to change direction
- Head angle
- +1.5°
- Steeper: sharper steering
- Chainstays
- −5 mm
- Shorter: livelier
The two frames
Lauf Seigla Core, SSurly Cross-Check Flat Bar, 46Drawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Lauf Seigla Core S | Surly Cross-Check Flat Bar 46 | Difference |
|---|---|---|---|
| Reach | 383 | 380.8 | −2 mm |
| Stack | 537 | 528.0 | −9 mm |
| Head tube angle | 70.5 | 72.0 | +1.5° |
| Seat tube angle | 72.7 | 74.5 | +1.8° |
| Chainstay length | 425 | 420.0 | −5 mm |
| Wheelbase | 1020 | 991.9 | −28 mm |
| BB drop | 65 | 66.0 | +1 mm |
| Standover | 763 | 766.7 | +4 mm |
| Effective top tube | not listed | 528.8 | |
| Seat tube length | not listed | 460.0 | |
| Fork length | not listed | 400.0 | |
| Head tube length | not listed | 91.0 |
Differences are the Surly Cross-Check Flat Bar minus the Lauf Seigla Core. Full charts: 2024 Lauf Seigla Core, 2022 Surly Cross-Check Flat Bar.
Where each sits in its class
Lauf Seigla CoreSurly Cross-Check Flat Bar
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 | Lauf Seigla CoreCore Transmission | Surly Cross-Check Flat BarFlat Bar |
|---|---|---|
| Frame | Lauf Seigla | Surly Cross-Check |
| Fork | Lauf JAF 2nd gen | Surly Cross-Check |
| Shifter | SRAM Apex | SRAM X5 |
| Derailleur | SRAM S1000 Eagle Transmission | SRAM X5 |
| Cassette | SRAM Eagle Transmission | Shimano PG920 |
| Chain | SRAM Eagle Transmission | KMC X9 |
| Crankset | SRAM Apex 1 Wide DUB | Surly E400 |
| Chainring | SRAM 40T | 42 |
| Bottom bracket | SRAM DUB | Shimano UN55 |
| Wheelset | e*thirteen XCX | Alex Rims Adventurer |
| Tire | Goodyear Connector | Surly Knard |
| Brake | SRAM Apex | Tektro M730 |
| Rotor | SRAM Apex | not listed |
| Handlebar | Lauf Smoothie | Surly Dimension |
| Stem | FSA V-Drive | Satori 25.4 |
| Bar tape | Lauf Lush | not listed |
| Headset | FSA Orbit | Cane Creek 5 |
| Seatpost | FSA V-Drive | Kalloy 27.2 |
| Saddle | Selle Italia Model X Light | WTB Silverado |
| Hub | not listed | SRAM MTH300 |
| Rim | not listed | Alex Rims Adventurer |
| Rack | not listed | Msw Pork Chop |
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