Bicycle Archive · Specification report

2011 Schwinn Sierra 21

Velopedia Archive ID 24421

Overview

Model year	2011
Brand	Schwinn
Model	Sierra 21
Bicycle type	Comfort/commuter
Archive ID	24421
Original MSRP	$379.00
Colors	Red, black
Sizes	S

Frameset

Frame construction	Aluminum
Frame material	Schwinn N'Litened Aluminum
Fork	Rigid Frame
Rear shock	N/A

Drivetrain

Component group	Commuter Mix
Shifters	Shimano Revo twist
Front derailleur	Shimano TX50
Rear derailleur	Shimano Altus
Crankset	Schwinn S Logo forged alloy, 42/34/24t teeth
Bottom bracket	Sealed cartridge
Chain	KMC Z-51
Pedals	Nylon Comfort

Brakes

Brakes	ProMax linear-pull brakes, Promax alloy levers

Cockpit & contact points

Headset	1 1/8" Threaded
Handlebar	80mm rise, 25-degree bend
Handlebar extensions	Not included
Stem	Alloy 30 deg rise comfort
Saddle	Comfort Tuned
Seatpost	Alloy Suspension, 26.8mm diameter

Wheels & tires

Hubs	KT alloy
Rims	Alex IC-1000, 32-hole
Spokes	Stainless, 14ga. (2.0mm)
Front tire	26 x 1.95" Schwinn
Wheel size	26" wheels

Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on October 8, 2026.