Seatpost parts for the Giant XTC Jr 24 (2015)

We have not verified this bike yet

7 of the 14 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.

Giant XTC Jr 24 (2015)

The seatpost of the Giant XTC Jr 24 (2015): 3 slots — Seatpost, Dropper post and Seat clamp. 2 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.

Seatpost diameter	27.2 mm (single-source)
Seatpost shape	Round (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

Seatpost
Dropper post
Seat clamp

Thomson Elite seatpost 27.2 mm
Seatpost
fits · confidence: single-source
Why? The facts we compared (2 dimensions compared)
- Seatpost diameter: bike 27.2 mm (single-source) · part 27.2 mm — match
- Seatpost shape: bike Round (single-source) · part Round — match
Sources:
- Giant Bicycles — XTC Jr 24 (2015) — specifications (tier 1, read 2026-08-21)
- Thomson — Elite Seatpost (tier 1, read 2026-08-21)
View specifications
Salsa Lip-Lock seat collar 30.0 mm
Seat clamp
unknown · confidence: single-source
Why? The facts we compared (1 dimension compared)
- Seat clamp diameter: bike nothing on file · part 30 mm — not on file
Sources:
- Salsa Cycles — Lip-Lock seat collar (tier 1, read 2026-08-21)
View specifications
Salsa Lip-Lock seat collar 35.0 mm
Seat clamp
unknown · confidence: single-source
Why? The facts we compared (1 dimension compared)
- Seat clamp diameter: bike nothing on file · part 35 mm — not on file
Sources:
- Salsa Cycles — Lip-Lock seat collar (tier 1, read 2026-08-21)
View specifications
Thomson Seatpost collar 28.6 mm
Seat clamp
unknown · confidence: single-source
Why? The facts we compared (1 dimension compared)
- Seat clamp diameter: bike nothing on file · part 28.6 mm — not on file
Sources:
- Thomson — Seatpost Collar (tier 1, read 2026-08-21)
View specifications
Thomson Seatpost collar 31.8 mm
Seat clamp
unknown · confidence: single-source
Why? The facts we compared (1 dimension compared)
- Seat clamp diameter: bike nothing on file · part 31.8 mm — not on file
Sources:
- Thomson — Seatpost Collar (tier 1, read 2026-08-21)
View specifications
Thomson Seatpost collar 34.9 mm
Seat clamp
unknown · confidence: single-source
Why? The facts we compared (1 dimension compared)
- Seat clamp diameter: bike nothing on file · part 34.9 mm — not on file
Sources:
- Thomson — Seatpost Collar (tier 1, read 2026-08-21)
View specifications
PNW Components Loam dropper post Gen 2, 30.9 mm × 150 mm
Dropper post
does not fit · confidence: single-source
Why? The facts we compared (3 dimensions compared)
- Seatpost diameter: bike 27.2 mm (single-source) · part 30.9 mm — mismatch
- Seatpost shape: bike Round (single-source) · part Round — match
- Dropper-post routing: bike nothing on file · part Internal (stealth) routing — not on file
Sources:
- Giant Bicycles — XTC Jr 24 (2015) — specifications (tier 1, read 2026-08-21)
- PNW Components — Loam Dropper Post Gen 2 (tier 1, read 2026-08-21)
View specifications
PNW Components Loam dropper post Gen 2, 31.6 mm × 150 mm
Dropper post
does not fit · confidence: single-source
Why? The facts we compared (3 dimensions compared)
- Seatpost diameter: bike 27.2 mm (single-source) · part 31.6 mm — mismatch
- Seatpost shape: bike Round (single-source) · part Round — match
- Dropper-post routing: bike nothing on file · part Internal (stealth) routing — not on file
Sources:
- Giant Bicycles — XTC Jr 24 (2015) — specifications (tier 1, read 2026-08-21)
- PNW Components — Loam Dropper Post Gen 2 (tier 1, read 2026-08-21)
View specifications
PNW Components Loam dropper post Gen 2, 34.9 mm × 150 mm
Dropper post
does not fit · confidence: single-source
Why? The facts we compared (3 dimensions compared)
- Seatpost diameter: bike 27.2 mm (single-source) · part 34.9 mm — mismatch
- Seatpost shape: bike Round (single-source) · part Round — match
- Dropper-post routing: bike nothing on file · part Internal (stealth) routing — not on file
Sources:
- Giant Bicycles — XTC Jr 24 (2015) — specifications (tier 1, read 2026-08-21)
- PNW Components — Loam Dropper Post Gen 2 (tier 1, read 2026-08-21)
View specifications
Thomson Elite seatpost 25.4 mm
Seatpost
does not fit · confidence: single-source
Why? The facts we compared (2 dimensions compared)
- Seatpost diameter: bike 27.2 mm (single-source) · part 25.4 mm — mismatch
- Seatpost shape: bike Round (single-source) · part Round — match
Sources:
- Giant Bicycles — XTC Jr 24 (2015) — specifications (tier 1, read 2026-08-21)
- Thomson — Elite Seatpost (tier 1, read 2026-08-21)
View specifications
Thomson Elite seatpost 30.9 mm
Seatpost
does not fit · confidence: single-source
Why? The facts we compared (2 dimensions compared)
- Seatpost diameter: bike 27.2 mm (single-source) · part 30.9 mm — mismatch
- Seatpost shape: bike Round (single-source) · part Round — match
Sources:
- Giant Bicycles — XTC Jr 24 (2015) — specifications (tier 1, read 2026-08-21)
- Thomson — Elite Seatpost (tier 1, read 2026-08-21)
View specifications
Thomson Elite seatpost 31.6 mm
Seatpost
does not fit · confidence: single-source
Why? The facts we compared (2 dimensions compared)
- Seatpost diameter: bike 27.2 mm (single-source) · part 31.6 mm — mismatch
- Seatpost shape: bike Round (single-source) · part Round — match
Sources:
- Giant Bicycles — XTC Jr 24 (2015) — specifications (tier 1, read 2026-08-21)
- Thomson — Elite Seatpost (tier 1, read 2026-08-21)
View specifications

Sources

Giant Bicycles — XTC Jr 24 (2015) — specifications (tier 1, read 2026-08-21)

Slots in this region

Parts menu — 12 parts

Sources