2025 Giant Escape Disc vs 2026 Surly Preamble Flat Bar
The Surly Preamble Flat Bar size closest to your M is the M. Compare the M instead
What changes on the Surly Preamble Flat Bar
Compared with the Giant Escape Disc in M, the Surly Preamble Flat Bar in XL places the top of the head tube 87 mm higher and 11 mm further forward, relative to the bottom bracket. Its wheelbase is 10 mm longer, which can contribute to stability at speed.
- Frame stack
- +87 mm
- Higher front end
- Frame reach
- +11 mm
- Longer frame reach
- Wheelbase
- +10 mm
- Longer: steadier at speed
- Head angle
- +1.0°
- Steeper: sharper steering
- Chainstays
- −10 mm
- Shorter: livelier
The two frames
Giant Escape Disc, MSurly Preamble Flat Bar, XLDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Giant Escape Disc M | Surly Preamble Flat Bar XL | Difference |
|---|---|---|---|
| Reach | 410 | 421 | +11 mm |
| Stack | 556 | 643 | +87 mm |
| Head tube angle | 71.0° | 72 | +1.0° |
| Seat tube angle | 73.0° | 72 | −1.0° |
| Effective top tube | 580 | 630 | +50 mm |
| Chainstay length | 445 | 435 | −10 mm |
| Wheelbase | 1075 | 1085 | +10 mm |
| BB drop | 60 | 66 | +6 mm |
| Standover | 754 | 901 | +147 mm |
| Seat tube length | 485 | 645 | +160 mm |
| Head tube length | 130 | 210 | +80 mm |
| Fork length | not listed | 400 |
Differences are the Surly Preamble Flat Bar minus the Giant Escape Disc. Full charts: 2025 Giant Escape Disc, 2026 Surly Preamble Flat Bar.
Where each sits in its class
Giant Escape DiscSurly Preamble 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 | Giant Escape DiscDisc 2 | Surly Preamble Flat BarFlat Bar |
|---|---|---|
| Frame | Giant ALUXX-grade | Surly Preamble |
| Fork | Giant Sport | not listed |
| Shifter | microSHIFT Advent | microSHIFT Acolyte Xpress |
| Derailleur | Giant micoSHIFT Advent | microSHIFT RD-M5185M |
| Cassette | Giant micorSHIFT Advent | not listed |
| Chain | KMC X9 | KMC Z8.3 |
| Crankset | Forged Alloy | not listed |
| Chainring | 40 narrow-wide | not listed |
| Bottom bracket | sealed cartridge | not listed |
| Pedals | Giant Urban Fitness | not listed |
| Wheelset | Giant double wall aluminum | not listed |
| Tire | Giant S-X2 | Kenda Kwik Tendril |
| Brake | Tektro HD-R280, Tektro TKD143 | Avid BB5 |
| Rotor | Giant MPH | not listed |
| Handlebar | Giant XS:60cm | not listed |
| Stem | Giant Sport | not listed |
| Grips | Giant ErgoContact | not listed |
| Headset | Giant OverDrive | not listed |
| Seatpost | Giant D-Fuse | not listed |
| Saddle | Giant ErgoContact | Selle Italia X |
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