Bicycle Archive · Specification report

2023 Polygon Tambora G4

Velopedia Archive ID 900001835

Overview

Model year	2023
Brand	Polygon
Model	TAMBORA G4
Bicycle type	Cyclocross/Gravel
Archive ID	900001835
Original MSRP	$899.00
Colors	White
Sizes	S; M; L; XL

Frameset

Frame construction	ALX Gravel
Frame material	Aluminum
Fork	Carbon Rigid
Fork material	Carbon Fiber

Drivetrain

Shifters	Microshift Advent X SB-M100, 1X10-Speed Brifter
Rear derailleur	Microshift Advent X M6205GM 10-speed
Crankset	Alloy 40T
Bottom bracket	Threaded BSA 68mm
Cassette	Microshift Advent X CS-H104 10 Speed 11-48T
Chain	KMC X10

Brakes

Brakes	Tektro MD-C550 Mechanical; Levers: Microshift Advent X SB-M100; Rotors: Tektro 160mm 6B

Cockpit & contact points

Headset	Token TK156SP-Chhc W/ Sealed Bearing
Handlebar	ALLOY FLARE 16degree, W: 420mm (S, M) / 440mm (L, XL), BB: 31,8mm, R/D: 125mm, B/R: 77mm
Stem	ALLOY STEM, EXT: 90mm (S, M) / 100mm (L, XL), BB: 31,8mm, R/D: 7degree
Saddle	Selle Italia Model X
Seatpost	Alloy Seatpost, DXL: 27,2 X 350mm

Wheels & tires

Hubs	F: Alloy Disc Brake 12x100mm 32H 6B / R: Alloy Disc Brake 12x142mm 32H 6B for Sprocket
Wheels	Alloy Double Wall 32H
Rims	Alloy Double Wall FV H: 19 622x23 32H TLR
Front tire	VEE Rail 700x40C 622x40 TLR
Rear tire	VEE Rail 700x40C 622x40 TLR

Geometry · S · Speed 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 · Speed 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 · Speed 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 · Speed 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

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 · 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	784 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

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