Velopedia Bicycle Archive

Surly Big Dummy Frameset - Twilight Zone

Original specifications: 26" wheels · geometry for 3 published sizes.

Share owner experience

At a glance

Model year: Not published by manufacturer
Category: Specialty
Original MSRP: $1,999.00
Sizes: S, M, L
Colors: Twilight Zone
Geometry: 3 manufacturer sizes
In this record: 5 specifications · 8 archived images · original MSRP · geometry
Archive ID: 900000474

Learn more about Surly →

Original buildSteel · 26"

Manufacturer catalog

Published sizes and colors

3 sizes · 1 color

Manufacturer-published sizes and colors; availability and exact size/color pairings may vary by market or production run.

Published sizes

SML

Published colors

Twilight Zone

Frameset

Frame Construction	4130 Chromoly, Natch tubing, double-butted main triangle, TIG welded
Frame Material	Steel
Fork	Surly Cocktail Fork - 4130 Chromoly, Natch tubing, double-butted tapered fork blades, TIG welded, E.D. coated
Fork Material	Steel

Wheels & Tires

Wheel Size	26"

Geometry

3 sizes · 17 measurements

Frame measurements by size.

Measurement	Small	Medium	Large
Seat tube	406 mm	432 mm	508 mm
Effective top tube	590 mm	620 mm	645 mm
Head tube	150 mm	180 mm	210 mm
Head-tube angle	70°	70°	70°
Seat-tube angle	72.5°	72.5°	72.5°
Chainstay / rear center	821 mm	821 mm	821 mm
Wheelbase	1469 mm	1500 mm	1527 mm
Bottom-bracket drop	40 mm	40 mm	40 mm
Bottom-bracket height	299 mm	299 mm	299 mm
Reach	410 mm	431 mm	447 mm
Stack	571 mm	599 mm	627 mm
Standover height	725 mm	773 mm	823 mm
Fork offset / rake	43 mm	43 mm	43 mm
Fork length / axle-to-crown	418 mm	418 mm	418 mm
Crank length	165 mm	170 mm	170 mm
Stem length	70 mm	70 mm	80 mm
Handlebar width	718 mm	735 mm	735 mm

Measurements may vary by configuration, wheel size, or frame setting where noted in the published chart.

Have you owned this bike?Help document firsthand fit, ride and maintenance details that may no longer be available.

This archive record has limited published detail. Share what would help another rider understand how this model fit, rode and held up over time. Velopedia reviews every contribution before publication.

Display name Required Email address Required · private Ownership Required When or how long you owned it Required Frame size Required Primary type of riding Required Rider height Optional

Overall owner experience Required · at least 120 characters0 of 120 minimum characters Would you own one again? Optional

Add fit, maintenance and buyer detailsOptional · five additional fields

Fit and sizing observations Optional Long-term strengths Optional Problems or recurring maintenance Optional Parts replaced or upgraded Optional What a used buyer should inspect Optional

Your contribution goes directly to Velopedia’s private review queue. We’ll email an optional confirmation link plus a private edit and withdrawal link, but you do not need to confirm your email before an administrator can review or approve the submission.

Already contributed? Send me a fresh private edit link

For privacy, Velopedia shows the same confirmation whether or not an experience exists.

Gallery8 images

Checking current listings…

Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.