Cockpit parts for the Surly Disc Trucker 700c (2024)

We have not verified this bike yet

13 of the 16 measurements are on file; 0 confirmed by two independent sources. Without enough evidence, fit stays “unknown.”

Only universal parts (lube, tools, bar tape) are offered for this bike until verification.

Surly Disc Trucker 700c (2024)

The cockpit of the Surly Disc Trucker 700c (2024): 5 slots — Shifter, Brake lever, Stem, Handlebar and Bar tape. 3 fit facts on file for this region. The parts menu below lists every catalogued part that belongs here with its computed verdict — fits, fits with adapter, does not fit or unknown — and why.

Stem bar-clamp diameter (fitted stem)	31.8 mm (single-source)
Handlebar clamp diameter (fitted bar)	31.8 mm (single-source)
Steerer clamp (stem)	1-1/8" (28.6 mm) (single-source)

What does "unknown" mean on this page?: That we do not have, on file, the bike measurement this part needs. It is not a quiet "yes": until the measurement is on file, we do not sell the part for this bike.

Slots in this region

Shifter
Brake lever
Stem
Handlebar
Bar tape

Zipp Service Course bar tape
Bar tape
fits · confidence: verified
Universal part: zero fit requirements, nothing to be wrong about.
Universal — no fit requirement
- Search AmazonSearch results · confirm model and availability.
- Zipp official siteModel page · confirm variant, availability and delivery.
Salsa Cowchipper flared drop handlebar
Handlebar
unknown · confidence: single-source
Why? The facts we compared (1 dimension compared)
- Stem bar-clamp diameter (fitted stem) (safety-critical): bike 31.8 mm (single-source) · part 31.8 mm — match
Downgraded to "unknown": every fact matches, but a safety-critical one is confirmed by a single source only — we say "fits" on a safety dimension only with two independent sources
Sources:
- Surly Bikes — Disc Trucker 700c — Hi-Viz Black — specifications and frame details (tier 1, read 2026-08-21)
- Salsa Cycles — Cowchipper handlebar (tier 1, read 2026-08-21)
View specifications
Thomson Elite X4 stem, 31.8 mm bar / 1-1/8" steerer
Stem
unknown · confidence: single-source
Why? The facts we compared (2 dimensions compared)
- Handlebar clamp diameter (fitted bar) (safety-critical): bike 31.8 mm (single-source) · part 31.8 mm — match
- Steerer clamp (stem) (safety-critical): bike 1-1/8" (28.6 mm) (single-source) · part 1-1/8" (28.6 mm) — match
Downgraded to "unknown": every fact matches, but a safety-critical one is confirmed by a single source only — we say "fits" on a safety dimension only with two independent sources
Sources:
- Surly Bikes — Disc Trucker 700c — Hi-Viz Black — specifications and frame details (tier 1, read 2026-08-21)
- Thomson — Elite 31.8mm X4 Stems (tier 1, read 2026-08-21)
View specifications
Zipp Service Course SL stem
Stem
unknown · confidence: single-source
Why? The facts we compared (2 dimensions compared)
- Handlebar clamp diameter (fitted bar) (safety-critical): bike 31.8 mm (single-source) · part 31.8 mm — match
- Steerer clamp (stem) (safety-critical): bike 1-1/8" (28.6 mm) (single-source) · part 1-1/8" (28.6 mm) — match
Downgraded to "unknown": every fact matches, but a safety-critical one is confirmed by a single source only — we say "fits" on a safety dimension only with two independent sources
Sources:
- Surly Bikes — Disc Trucker 700c — Hi-Viz Black — specifications and frame details (tier 1, read 2026-08-21)
- Zipp (SRAM) — Service Course SL Stem — ST-SC-SL-B2 (tier 1, read 2026-08-21)
View specifications
Zipp Service Course SL-70 drop handlebar
Handlebar
unknown · confidence: single-source
Why? The facts we compared (1 dimension compared)
- Stem bar-clamp diameter (fitted stem) (safety-critical): bike 31.8 mm (single-source) · part 31.8 mm — match
Downgraded to "unknown": every fact matches, but a safety-critical one is confirmed by a single source only — we say "fits" on a safety dimension only with two independent sources
Sources:
- Surly Bikes — Disc Trucker 700c — Hi-Viz Black — specifications and frame details (tier 1, read 2026-08-21)
- Zipp (SRAM) — Service Course SL-70 Handlebar — HB-DBSC-SL70-B2 (tier 1, read 2026-08-21)
View specifications
Zipp Service Course stem
Stem
unknown · confidence: single-source
Why? The facts we compared (2 dimensions compared)
- Handlebar clamp diameter (fitted bar) (safety-critical): bike 31.8 mm (single-source) · part 31.8 mm — match
- Steerer clamp (stem) (safety-critical): bike 1-1/8" (28.6 mm) (single-source) · part 1-1/8" (28.6 mm) — match
Downgraded to "unknown": every fact matches, but a safety-critical one is confirmed by a single source only — we say "fits" on a safety dimension only with two independent sources
Sources:
- Surly Bikes — Disc Trucker 700c — Hi-Viz Black — specifications and frame details (tier 1, read 2026-08-21)
- Zipp (SRAM) — Service Course Stem — ST-SC-B2 (tier 1, read 2026-08-21)
View specifications
Race Face Aeffect R 35 riser handlebar, 780 mm
Handlebar
does not fit · confidence: single-source
Why? The facts we compared (1 dimension compared)
- Stem bar-clamp diameter (fitted stem) (safety-critical): bike 31.8 mm (single-source) · part 35 mm — mismatch
Sources:
- Surly Bikes — Disc Trucker 700c — Hi-Viz Black — specifications and frame details (tier 1, read 2026-08-21)
- Race Face — Aeffect R 35 Handlebar (tier 1, read 2026-08-21)
View specifications

Sources

Surly Bikes — Disc Trucker 700c — Hi-Viz Black — specifications and frame details (tier 1, read 2026-08-21)

Slots in this region

Parts menu — 7 parts

Zipp Service Course bar tape

Salsa Cowchipper flared drop handlebar

Thomson Elite X4 stem, 31.8 mm bar / 1-1/8" steerer

Zipp Service Course SL stem

Zipp Service Course SL-70 drop handlebar

Zipp Service Course stem

Race Face Aeffect R 35 riser handlebar, 780 mm

Sources