Syncline C5
Polygon
Trail
Syncline C5 is a carbon trail mountain bike (2024), by Polygon, from the Syncline lineup. It is a strong match for riders who prioritize comfort and confidence on longer off-road rides, with a comfort-leaning position, while being best for smoother trails and efficient rolling. Its profile is strongest in areas like strong value-for-money versus many similar bikes, strong climbing friendliness for sustained uphill riding, and good fit flexibility for dialing in rider position. Relative to category specialists, the trade-off is a firmer ride feel than comfort-first options. This summary is a starting point—compare this bike on MatchBikes.com with similar bikes.
7.5
Rating

+5
Image 1 of 11
Score Summary
Performance
6.9
Value
9.8
Fit
6.8
Performance
Built for speed and efficiency
Speed
6.7
Medium
Climbing Efficiency
9.7
Mountain Goat
Suspension
6.0
Confident trail control
Fit
Dialed-in Fit & Comfort
Riding Position
5.0
Comfort
Fit Flexibility
8.1
Adjustable
Ride Comfort
6.6
Firm
Value
Value for Money
9.8
Exceptional Value
Surface Range
Flow TrailsSpecifications
General
Brand
Polygon
Model
Syncline C5
Year
2024
Price
$1,704
Weight
11.9 kg
Category
Mountain
Sub Category
Trail
Groupset
SLX
Wheels
27.5"
Frame
Frame
ACX XC Performance Carbon Fibre, Pressfit BB92, Internal Cable Route, Boost 12x148mm Rear Thru-Axle
Suspension Fork
Fox 32 Rhythm 120mm Travel, Rebound & Sweep Adjustment, Tapered, Boost Thru-Axle 15x110mm
Suspension Type
Hardtail
Drivetrain
Shift Levers
Shimano SLX SL-M7100
Rear Derailleur
Shimano SLX RD-M7100 Shadow Plus 12 Speed
Cassette
Sunrace MZ-800, 11-51T, 12-Speed
Crank
Shimano SLX FC-M7100 Chainwheel 32T
Bottom Bracket
Shimano Press-Fit Bb
Chain
KMC X12 12 Speed
Wheels
Front Hub
Joytech D041SB, 15x110mm, 32H, Center Lock
Rear Hub
Novatec D462SB, 12x148mm 32H, Center Lock
Rims
Entity XL2 Disc, Double Wall Alloy Rims, 30mm Internal Width, Tubeless Tape Installed **
Tires
WTB Trail Boss 27.5 x 2.25/29 x 2.25 *
Brakes
Brake Type
Hydraulic Disc
Brake Description
Hydraulic Disc
Cockpit
Stem
Entity Xpert, Alloy 60mm
Handlebar
Entity Xpert Alloy 740mm
Seat
Saddle
Entity Void, Steel Rail
Seatpost
Entity Expert, Zero Offset, 27.2x350mm
Geometry
| Measurement | SM | MD | MD | LG | XL |
|---|---|---|---|---|---|
| Stack Reach Ratio | 1.46 mm | 1.43 mm | 1.48 mm | 1.45 mm | 1.43 mm |
| Bottom Bracket Height | 308 mm | 308 mm | 307 mm | 307 mm | 307 mm |
| Front Center | 685 mm | 713 mm | 722 mm | 749 mm | 777 mm |
| Rake | 36 mm | 36 mm | 44 mm | 43 mm | 43 mm |
| Trail | 112 mm | 112 mm | 111 mm | 112 mm | 112 mm |
| Stack | 593 mm | 612 mm | 630 mm | 648 mm | 667 mm |
| Reach | 407 mm | 427 mm | 427 mm | 447 mm | 467 mm |
| Top Tube Length | 566 mm | 591 mm | 594 mm | 618 mm | 646 mm |
| Seat Tube Angle | 75 ° | 75 ° | 75 ° | 75 ° | 75 ° |
| Seat Tube Length | 380 mm | 420 mm | 420 mm | 460 mm | 500 mm |
| Head Tube Angle | 67 ° | 67 ° | 67 ° | 67 ° | 67 ° |
| Head Tube Length | 100 mm | 120 mm | 100 mm | 120 mm | 140 mm |
| Chainstay Length | 422 mm | 422 mm | 432 mm | 432 mm | 432 mm |
| Wheelbase | 1103 mm | 1131 mm | 1146 mm | 1173 mm | 1201 mm |
| Bottom Bracket Drop | 45 mm | 45 mm | 65 mm | 65 mm | 65 mm |
| Standover Height | 687 mm | 726 mm | 727 mm | 760 mm | 776 mm |
| Front Travel | 120 mm | 120 mm | 120 mm | 120 mm | 120 mm |
| Wheels | 27" | 27" | 29" | 29" | 29" |
| Rider Min Height | 158 cm | 166 cm | 168 cm | 176 cm | 184 cm |
| Rider Max Height | 169 cm | 176 cm | 179 cm | 187 cm | 195 cm |




























































