Bicycle Archive · Specification report

Surly Lowside - Blue Monday

Velopedia Archive ID 900000933

Overview

Model year	Model year not published
Brand	Surly
Model	Lowside - Blue Monday
Bicycle type	Mountain
Archive ID	900000933
Original MSRP	$1,799.00
Sizes	X-Small; Small; Medium; Large; X-Large
Weight	28 lb 1 oz for Medium

Frameset

Frame construction	Surly Lowside - 4130 Chromoly, Natch tubing, double-butted main triangle, TIG welded, E.D. coated
Frame material	Steel
Fork	Surly Lowside - 4130 Chromoly, Natch tubing, double-butted tapered fork blades, TIG welded, E.D. coated
Fork material	Steel

Drivetrain

Shifters	N/A
Front derailleur	N/A
Rear derailleur	N/A
Crankset	SRAM NX Eagle, 32t
Bottom bracket	SRAM PowerSpline, BSA, 73mm
Cassette	Surly 17T Cog w/ Spacer Kit, silver
Chain	KMC X9

Brakes

Brakes	Brake Calipers: Tektro HD-M275/276, 2-piston; Brake Levers: Tektro HD-M275/276; Rotors: Tektro 160/160mm, 6-Bolt

Cockpit & contact points

Headset	FSA Orbit ITA, Silver
Handlebar	Surly Sunset (Painted to match frame)
Stem	Sunday Freeze Stem Top-Load, Silver
Saddle	WTB Volt Medium, silver rails
Seatpost	Promax SP-2019, Silver

Wheels & tires

Hubs	(F) Novatec 15 x 110mm, silver / (R) Novatec 12 x 148mm, silver
Rims	WTB ST i35 TCS 2.0 27.5", 32h
Spokes	14g stainless, silver
Front tire	Maxxis Rekon+ 27.5" x 2.8", 60 TPI, tan sidewalls, tubeless-ready, WTB TCS Sealant included
Rear tire	Maxxis Rekon+ 27.5" x 2.8", 60 TPI, tan sidewalls, tubeless-ready, WTB TCS Sealant included
Wheel size	27.5"; 26"

Geometry · X-Small

Seat tube	316 mm
Effective top tube	570 mm
Head tube	110 mm
Head-tube angle	70°
Seat-tube angle	74°
Chainstay / rear center	425 mm
Wheelbase	1068 mm
Bottom-bracket drop	55 mm
Reach	414.5 mm
Stack	542.2 mm
Standover height	700 mm
Fork offset / rake	47 mm
Fork length / axle-to-crown	420 mm
Crank length	165 mm
Stem length	48 mm
Handlebar width	820 mm

Geometry · Small

Seat tube	366 mm
Effective top tube	590 mm
Head tube	125 mm
Head-tube angle	70°
Seat-tube angle	74°
Chainstay / rear center	425 mm
Wheelbase	1089 mm
Bottom-bracket drop	55 mm
Reach	429.3 mm
Stack	560.3 mm
Standover height	729 mm
Fork offset / rake	47 mm
Fork length / axle-to-crown	420 mm
Crank length	165 mm
Stem length	48 mm
Handlebar width	820 mm

Geometry · Medium

Seat tube	416 mm
Effective top tube	610 mm
Head tube	140 mm
Head-tube angle	70°
Seat-tube angle	74°
Chainstay / rear center	425 mm
Wheelbase	1110 mm
Bottom-bracket drop	55 mm
Reach	445.3 mm
Stack	574.4 mm
Standover height	762 mm
Fork offset / rake	47 mm
Fork length / axle-to-crown	420 mm
Crank length	165 mm
Stem length	48 mm
Handlebar width	820 mm

Geometry · Large

Seat tube	466 mm
Effective top tube	630 mm
Head tube	155 mm
Head-tube angle	70°
Seat-tube angle	74°
Chainstay / rear center	425 mm
Wheelbase	1131 mm
Bottom-bracket drop	55 mm
Reach	461 mm
Stack	588.5 mm
Standover height	792 mm
Fork offset / rake	47 mm
Fork length / axle-to-crown	420 mm
Crank length	170 mm
Stem length	48 mm
Handlebar width	820 mm

Geometry · X-Large

Seat tube	516 mm
Effective top tube	650 mm
Head tube	170 mm
Head-tube angle	70°
Seat-tube angle	74°
Chainstay / rear center	425 mm
Wheelbase	1152 mm
Bottom-bracket drop	55 mm
Reach	477 mm
Stack	602.5 mm
Standover height	823 mm
Fork offset / rake	47 mm
Fork length / axle-to-crown	420 mm
Crank length	170 mm
Stem length	48 mm
Handlebar width	820 mm

Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on August 25, 2026.