Atelier 700Open the shop

Maxxis Holy Roller 20×1 3/8 (37-451)

Maxxis tyre. Needs from your bike: Wheel size (ISO bead seat) and Maximum tyre width (frame).

The Maxxis Holy Roller 20×1 3/8 (37-451) is a tyre (consumable). It requires 2 things of a bike — Wheel size (ISO bead seat) and Maximum tyre width (frame) — read from Maxxis. On every bike page its verdict is computed from those requirements against the bike's cited facts: when a fact is missing the answer is "unknown", never a guess.

Requires — Wheel size (ISO bead seat)20" 451 (ISO 451)
Requires — Maximum tyre width (frame)≥ 37 mm
Does this part fit my bike?
Find your bike under "Fits these bikes" below, or open your bike's "Rear wheel" region page. The verdict there is computed from this part's requirements against the bike's cited facts — with its confidence and sources.
What does "does not fit" mean here?
That a fact on file for the bike contradicts a requirement of this part — a confident no, with both values shown.

Standards

  • 20" 451 (ISO 451)
  • ≥ 37 mm

Needs from your bike: Wheel size (ISO bead seat): 20" 451 (ISO 451) · Maximum tyre width (frame): ≥ 37 mm

Tyre

Find this part

Choose the right variant and check the fit for your bike.

Fits these bikes

Giant Talon 2 (2025)unknown · confidence: single-source
Why? The facts we compared (2 dimensions compared)
  • Maximum tyre width (frame): bike 61 mm (single-source) · part ≥ 37 mm — match
  • Wheel size (ISO bead seat): bike nothing on file · part 20" 451 (ISO 451) — not on file

Sources:

Brompton C Line 12-speed (2025)does not fit · confidence: single-source
Why? The facts we compared (2 dimensions compared)
  • Maximum tyre width (frame): bike nothing on file · part ≥ 37 mm — not on file
  • Wheel size (ISO bead seat): bike 16" Brompton / 16 × 1 3/8 (ISO 349) (single-source) · part 20" 451 (ISO 451) — mismatch

Sources:

Canyon Grail CF SL 7 (2025)does not fit · confidence: single-source
Why? The facts we compared (2 dimensions compared)
  • Maximum tyre width (frame): bike 42 mm (single-source) · part ≥ 37 mm — match
  • Wheel size (ISO bead seat): bike 700c / 29" (ISO 622) (single-source) · part 20" 451 (ISO 451) — mismatch

Sources:

Canyon Ultimate CF 7 (2025)does not fit · confidence: single-source
Why? The facts we compared (2 dimensions compared)
  • Maximum tyre width (frame): bike 33 mm (single-source) · part ≥ 37 mm — mismatch
  • Wheel size (ISO bead seat): bike 700c / 29" (ISO 622) (single-source) · part 20" 451 (ISO 451) — mismatch

Sources:

Giant Defy Advanced 2 (2025)does not fit · confidence: single-source
Why? The facts we compared (2 dimensions compared)
  • Maximum tyre width (frame): bike nothing on file · part ≥ 37 mm — not on file
  • Wheel size (ISO bead seat): bike 700c / 29" (ISO 622) (single-source) · part 20" 451 (ISO 451) — mismatch

Sources:

Giant Escape 3 (2024)does not fit · confidence: single-source
Why? The facts we compared (2 dimensions compared)
  • Maximum tyre width (frame): bike 45 mm (single-source) · part ≥ 37 mm — match
  • Wheel size (ISO bead seat): bike 700c / 29" (ISO 622) (single-source) · part 20" 451 (ISO 451) — mismatch

Sources:

Giant Fathom 29 2 (2022)does not fit · confidence: single-source
Why? The facts we compared (2 dimensions compared)
  • Maximum tyre width (frame): bike 63.5 mm (single-source) · part ≥ 37 mm — match
  • Wheel size (ISO bead seat): bike 700c / 29" (ISO 622) (single-source) · part 20" 451 (ISO 451) — mismatch

Sources:

Giant Glory Advanced (2025)does not fit · confidence: single-source
Why? The facts we compared (2 dimensions compared)
  • Maximum tyre width (frame): bike 63.5 mm (single-source) · part ≥ 37 mm — match
  • Wheel size (ISO bead seat): bike 650b / 27.5" (ISO 584) (single-source) · part 20" 451 (ISO 451) — mismatch

Sources:

Giant Propel Advanced 2 (2027)does not fit · confidence: single-source
Why? The facts we compared (2 dimensions compared)
  • Maximum tyre width (frame): bike 32 mm (single-source) · part ≥ 37 mm — mismatch
  • Wheel size (ISO bead seat): bike 700c / 29" (ISO 622) (single-source) · part 20" 451 (ISO 451) — mismatch

Sources:

Giant Reign 29 2 (2021)does not fit · confidence: single-source
Why? The facts we compared (2 dimensions compared)
  • Maximum tyre width (frame): bike nothing on file · part ≥ 37 mm — not on file
  • Wheel size (ISO bead seat): bike 700c / 29" (ISO 622) (single-source) · part 20" 451 (ISO 451) — mismatch

Sources:

Giant Revolt Advanced 2 (2025)does not fit · confidence: single-source
Why? The facts we compared (2 dimensions compared)
  • Maximum tyre width (frame): bike 53 mm (single-source) · part ≥ 37 mm — match
  • Wheel size (ISO bead seat): bike 700c / 29" (ISO 622) (single-source) · part 20" 451 (ISO 451) — mismatch

Sources:

Giant Roam 2 Disc (2021)does not fit · confidence: single-source
Why? The facts we compared (2 dimensions compared)
  • Maximum tyre width (frame): bike nothing on file · part ≥ 37 mm — not on file
  • Wheel size (ISO bead seat): bike 700c / 29" (ISO 622) (single-source) · part 20" 451 (ISO 451) — mismatch

Sources:

Giant Talon E+ (2026)does not fit · confidence: single-source
Why? The facts we compared (2 dimensions compared)
  • Maximum tyre width (frame): bike nothing on file · part ≥ 37 mm — not on file
  • Wheel size (ISO bead seat): bike 700c / 29" (ISO 622) (single-source) · part 20" 451 (ISO 451) — mismatch

Sources:

Giant TCX Advanced Pro 2 (2023)does not fit · confidence: single-source
Why? The facts we compared (2 dimensions compared)
  • Maximum tyre width (frame): bike 45 mm (single-source) · part ≥ 37 mm — match
  • Wheel size (ISO bead seat): bike 700c / 29" (ISO 622) (single-source) · part 20" 451 (ISO 451) — mismatch

Sources:

Giant Trance X 29 2 (2022)does not fit · confidence: single-source
Why? The facts we compared (2 dimensions compared)
  • Maximum tyre width (frame): bike 63.5 mm (single-source) · part ≥ 37 mm — match
  • Wheel size (ISO bead seat): bike 700c / 29" (ISO 622) (single-source) · part 20" 451 (ISO 451) — mismatch

Sources:

Giant XTC Jr 24 (2015)does not fit · confidence: single-source
Why? The facts we compared (2 dimensions compared)
  • Maximum tyre width (frame): bike nothing on file · part ≥ 37 mm — not on file
  • Wheel size (ISO bead seat): bike 24" (ISO 507) (single-source) · part 20" 451 (ISO 451) — mismatch

Sources:

Kona Sutra (2025)does not fit · confidence: single-source
Why? The facts we compared (2 dimensions compared)
  • Maximum tyre width (frame): bike 40 mm (single-source) · part ≥ 37 mm — match
  • Wheel size (ISO bead seat): bike 700c / 29" (ISO 622) (single-source) · part 20" 451 (ISO 451) — mismatch

Sources:

Liv Flourish 2 (2017)does not fit · confidence: single-source
Why? The facts we compared (2 dimensions compared)
  • Maximum tyre width (frame): bike nothing on file · part ≥ 37 mm — not on file
  • Wheel size (ISO bead seat): bike 700c / 29" (ISO 622) (single-source) · part 20" 451 (ISO 451) — mismatch

Sources:

State Bicycle Co. Core-Line (2024)does not fit · confidence: single-source
Why? The facts we compared (2 dimensions compared)
  • Maximum tyre width (frame): bike 28 mm (single-source) · part ≥ 37 mm — mismatch
  • Wheel size (ISO bead seat): bike 700c / 29" (ISO 622) (single-source) · part 20" 451 (ISO 451) — mismatch

Sources:

Surly Disc Trucker 700c (2024)does not fit · confidence: single-source
Why? The facts we compared (2 dimensions compared)
  • Maximum tyre width (frame): bike 47 mm (single-source) · part ≥ 37 mm — match
  • Wheel size (ISO bead seat): bike 700c / 29" (ISO 622) (single-source) · part 20" 451 (ISO 451) — mismatch

Sources:

See all 23 bikes

Sources

The spec sheets we read. Every fact above cites one of them.

The shop · Atelier 700