2025 CTM Bikes Zephyr Base XL
Build
700C/29 in × 2.4 in
Insights
Average stack and reach vs trend of hardtail trail mtb bikes
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Stack and Reach vs. Category Trend
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Geometry
| Stack | 635mm |
| Reach | 470mm |
| Stack to Reach Ratio | 1.35:1 |
| Seat Tube Length, C-T | 520mm |
| Top Tube Length, Effective/Horizontal Center | 633mm |
| Top Tube Slope | 12.6deg |
| Head Tube Angle | 66deg |
| Seat Tube Angle | 72deg |
| Head Tube Length | 115mm |
| Bottom Bracket Drop | 50mm |
| Bottom Bracket Height | 322mm |
| Chainstay Length | 435mm |
| Chainstay Length Horizontal | 432.1mm |
| Front-Center | 787.5mm |
| Front-Center Horizontal | 785.9mm |
| Wheelbase | 1218mm |
| Fork Offset/Rake | 51mm |
| Fork Length (On-Axis) | 545mm |
| Trail | 109.8mm very high |
| Mechanical Trail | 100.3mm |
| Wheel Flop | 40.8mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 245.5mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 152mm |
Base Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 2.4in |
| Tire Outer Diameter | 743.9mm |
| Bike Length with Tires | 1961.9mm |
| Suspension Type | Hardtail (Front suspension) |
| Bar Type | Flat Bar |
| Fork Travel | 120mm |
| Suspension Sag | Unknown |
| Frame Material | Unknown |
| Fork Material | Unknown |
| Brake Type | Disc |
Source:https://www.ctm.sk/cz/p/zephyr-29-2025