Bicycle Archive · Specification report

2025 Polygon Tambora A5

Velopedia Archive ID 900001854

Overview

Model year	2025
Brand	Polygon
Model	TAMBORA A5
Bicycle type	Cyclocross/Gravel
Archive ID	900001854
Original MSRP	$2,499.00
Colors	Red Black
Sizes	S; M; L; XL

Frameset

Frame construction	ACX Gravel
Frame material	Carbon Fiber
Fork	Carbon Rigid
Fork material	Carbon Fiber

Drivetrain

Shifters	Shimano GRX ST-RX600, 2X11-Speed Brifter
Rear derailleur	Shimano GRX RD-RX810
Crankset	Praxis Alba GR M30, 48-32T
Bottom bracket	Praxis Alba T47 M30, 85.5mm
Cassette	Shimano CS-HG700, 11-34T
Chain	KMC X11

Brakes

Brakes	Shimano GRX Hydraulic Disc; Levers: Shimano ST-RX600; Rotors: Shimano RT-CL700, 160mm

Cockpit & contact points

Headset	Token TK155SP-36 W/ Sealed Bearing, IS 52/28.6 \| IS 52/40
Handlebar	Polygon Expert, W: 420mm (S, M) / 440mm (L, XL), BB: 31.8mm, R/D: 125mm, B/R: 77mm
Stem	POLYGON EXPERT, EXT: 90mm (S, M) / 100mm (L, XL), BB: 31.8mm, R/D: 7degree
Saddle	Fizik Terra Argo X7
Seatpost	Carbon, DXL: 27.2X400mm

Wheels & tires

Hubs	F: Novatec D791SB 12x100mm 32H CL / R: Novatec D792SB 12x142mm 32H CL for Sprocket
Wheels	Alloy Double Wall 32H
Rims	F: Alloy Double Wall FV H: 20 622 32H TLR / R: Alloy Double Wall FV H: 20 622 32H TLR
Front tire	Maxxis RE-Fuse 700x32C
Rear tire	Maxxis RE-Fuse 700x32C

Geometry · S · All Road

Seat tube	404 mm
Effective top tube	526 mm
Head tube	143 mm
Head-tube angle	70.25°
Seat-tube angle	74.75°
Actual seat-tube angle	74.75°
Chainstay / rear center	415 mm
Wheelbase	997 mm
Bottom-bracket drop	79 mm
Bottom-bracket height	265 mm
Reach	371 mm
Stack	566 mm
Standover height	701 mm

Geometry · M · All Road

Seat tube	448 mm
Effective top tube	550 mm
Head tube	163 mm
Head-tube angle	71.77°
Seat-tube angle	74.26°
Actual seat-tube angle	74.26°
Chainstay / rear center	415 mm
Wheelbase	1003 mm
Bottom-bracket drop	79 mm
Bottom-bracket height	265 mm
Reach	383 mm
Stack	591 mm
Standover height	741 mm

Geometry · L · All Road

Seat tube	492 mm
Effective top tube	581 mm
Head tube	193 mm
Head-tube angle	72.06°
Seat-tube angle	73.76°
Actual seat-tube angle	73.76°
Chainstay / rear center	415 mm
Wheelbase	1026 mm
Bottom-bracket drop	79 mm
Bottom-bracket height	265 mm
Reach	400 mm
Stack	621 mm
Standover height	783 mm

Geometry · XL · All Road

Seat tube	535 mm
Effective top tube	610 mm
Head tube	221 mm
Head-tube angle	72.26°
Seat-tube angle	73.26°
Actual seat-tube angle	73.26°
Chainstay / rear center	415 mm
Wheelbase	1048 mm
Bottom-bracket drop	79 mm
Bottom-bracket height	265 mm
Reach	415 mm
Stack	648 mm
Standover height	819 mm

Geometry · S · Gravel

Seat tube	404 mm
Effective top tube	526 mm
Head tube	143 mm
Head-tube angle	70°
Seat-tube angle	74.5°
Actual seat-tube angle	74.5°
Chainstay / rear center	425 mm
Wheelbase	1017 mm
Bottom-bracket drop	78 mm
Bottom-bracket height	280 mm
Reach	369 mm
Stack	568 mm
Standover height	716 mm

Geometry · M · Gravel

Seat tube	448 mm
Effective top tube	551 mm
Head tube	163 mm
Head-tube angle	71.5°
Seat-tube angle	74°
Actual seat-tube angle	74°
Chainstay / rear center	425 mm
Wheelbase	1022 mm
Bottom-bracket drop	78 mm
Bottom-bracket height	280 mm
Reach	381 mm
Stack	593 mm
Standover height	755 mm

Geometry · L · Gravel

Seat tube	492 mm
Effective top tube	581 mm
Head tube	193 mm
Head-tube angle	71.8°
Seat-tube angle	73.5°
Actual seat-tube angle	73.5°
Chainstay / rear center	425 mm
Wheelbase	1045 mm
Bottom-bracket drop	78 mm
Bottom-bracket height	280 mm
Reach	397 mm
Stack	622 mm
Standover height	798 mm

Geometry · XL · Gravel

Seat tube	535 mm
Effective top tube	611 mm
Head tube	221 mm
Head-tube angle	72°
Seat-tube angle	73°
Actual seat-tube angle	73°
Chainstay / rear center	425 mm
Wheelbase	1067 mm
Bottom-bracket drop	78 mm
Bottom-bracket height	280 mm
Reach	412 mm
Stack	650 mm
Standover height	833 mm

Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on September 13, 2026.