Handlebar size
35 mm handlebars: which light and phone mounts list it
35 mm is the top of CatEye's H-34N and Knog's Blinder 1400 ranges, inside Quad Lock's and SP Connect's, and not a size for Wahoo's 31.8 mm out-front mount.
Also listed as 35mm
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Short answer
A 35 mm bar is the top of the ranges CatEye lists for its H-34N bracket (22-35 mm) and Knog for the Blinder 1400 (22.2-35 mm). It is inside Quad Lock's 25-40 mm and SP Connect's about 20-44 mm. Wahoo makes its BOLT 3 / ROAM 3 out-front mount for 31.8 mm, not 35 mm. Measure your bar where the clamp will sit.
Key facts
- How to check yours
- Measure where the clamp will sit, in millimeters, because makers state their ranges that way (Knog's Blinder 1400: 22.2-35 mm). Use a caliper, or wrap a paper strip around the bar, mark the overlap and divide that length by pi (3.14).[1]
- Mounts whose maker range includes it
- CatEye H-34N headlight bracket (22-35 mm, top of range); Knog Blinder 1400 bar mount (22.2-35 mm, top of range); Quad Lock Handlebar/Stem Mount (25-40 mm); SP Connect Universal Bike Mount (about 20-44 mm).[2][1][3][4]
- Mounts that do not list it
- Wahoo's BOLT 3 / ROAM 3 out-front mount is for 31.8 mm round bars.[5]
- Shims, straps and adapters
- Quad Lock supplies 2 small and 2 large rubber O-rings and nylon zip ties with the Handlebar/Stem Mount. SP Connect includes one flat and one round diameter adapter.[3][4]
- Devices and lights
- CatEye lists the H-34N for its AMPP, GVOLT, Sync Core, GE100 and HL-EL160/135 lights. Knog includes a GoPro-style mount with the Blinder 1400 as well as its bar mount.[2][1]
- Not confirmed
- No source we read says where on a bar, or on which bikes, 35 mm is found. Peak Design's bar range for the Out Front Bike Mount V2 is not stated on its page.[6]
Watch out for
- 35 mm is the very top of the CatEye H-34N and Knog Blinder 1400 ranges, so measure carefully.
- Wahoo's BOLT 3 / ROAM 3 out-front mount is made for 31.8 mm, not 35 mm.
- A 31.8 mm-only computer mount will not be the right clamp size here; check the maker's stated diameter.
What fits
Product details below are the seller's own description unless a source is shown. Pick the variant named for each item.
Light mount
Magicshine MJ‑6272 aluminium out-front mount (GoPro interface)Choose the MJ-6272 out-front mount.
Magicshine lists it for 31.8-35 mm bars.
Front light
Knog Blinder 1400 front light (2nd gen, USB-C)Choose the Blinder 1400 (2nd gen, USB-C); it is the only version listed.
Knog lists a 22.2-35 mm bar mount, so 35 mm is the top of its range.
Light bracket
CatEye H‑34N FlexTight headlight bracket (22‑35 mm)Choose the H-34N bracket; it fits CatEye lights only.
CatEye lists 22-35 mm, attaching without tools.
Phone mount
SP Connect Universal Bike Mount (phone, 20‑44 mm bars and stems)Choose the Universal Bike Mount (SKU 53342).
SP Connect lists bars or stems of about 20-44 mm.
Next: how to measure your handlebar and bike phone mounts and their fit.
Questions
Will a CatEye H-34N bracket fit a 35 mm bar?
CatEye lists the H-34N for 22-35 mm handlebars, so 35 mm is the top of its stated range.[2]
Is there a Wahoo out-front mount for 35 mm?
Wahoo makes its BOLT 3 / ROAM 3 out-front mount for 31.8 mm round bars; we read no Wahoo statement about a 35 mm version.[5]