A positive lock, four named bar sizes, and a case to buy as well
Quad Lock Out Front V3, case mount, 87 g (3.1 oz)
An out-front handlebar phone mount with a dual-stage twist lock, reversible above or below the stem, for four handlebar diameters.
What you are getting
The Quad Lock Out Front V3: an out-front handlebar mount with a patented dual-stage twist lock, 87 g (3.1 oz), stainless steel hardware, reversible to sit above or below the stem, and fitting handlebars of 22, 25.4, 31.8 and 35 mm (1.38 in). $43.94 — the most expensive mount on this page by $14.
It is the case-mount half of this shelf’s tag
“Works with all Quad Lock Cases, Universal Adaptors, and the Quad Lock Camera/Light Adaptor.”
The tag on this page is that clamp mounts fit any phone; case mounts hold better and fit one. This is the case mount, and the consequence is on the listing: it holds nothing on its own. You need either a Quad Lock case for your specific phone, or the universal adapter that sticks to a phone or case you already own.
So the real price is this plus a case. That is the trade for a lock that engages positively rather than gripping by friction — a twist-and-click instead of four arms squeezing a phone that can still be flicked out by a pothole.
Four handlebar diameters, named
22, 25.4, 31.8 and 35 mm — ⅞”, 1”, 1¼” and 1⅜”.
That is the most complete fitment statement on this page, and it covers the four diameters a bicycle handlebar actually comes in: 22.2 mm at the grips of a flat bar, 25.4 mm (1 in) on older and some drop bars, 31.8 mm (1.25 in) on most modern clamp areas, and 35 mm (1.38 in) on current mountain bars.
Compare the Lamicall at 15–40 mm (0.59 to 1.57 in) and the JOYROOM at 18–34 mm (0.71 to 1.34 in) — ranges rather than sizes, which is how a clamp with rubber shims works. Quad Lock supplies the sizes.
The buying advice on the grips shelf of this site applies here too: measure where the mount will sit, not at the stem.
Out front, which is a position and not a feature
“Reversible out front design — mount forward or flip over the stem.”
An out-front mount puts the phone ahead of the bars, where a bike computer goes: in the rider’s natural sightline, clear of the cables and the stem bolts, and far enough forward that it does not foul a hand on the tops.
It also puts the phone first in a crash. That is the trade nobody states.
Eighty-seven grams, and stainless hardware
87 g (3.1 oz), against 65 g (2.3 oz) for the Bone strap mount, 40 g (1.4 oz) for the Kinizuxi and 198 g (7 oz) for the Lamicall clamp. So it is mid-weight — an out-front arm has a cantilever to support, and stainless bolts are heavier than the plastic screws the silicone mounts avoid entirely.
“Premium stainless steel hardware for long-lasting performance.” On a part that lives outside, the bolts are what seize.
What a dual-stage lock means
Two actions: push and twist. The second stage is what stops the first from releasing on vibration, and it is the reason a case mount can be trusted on rough ground where a friction grip cannot.
Quad Lock calls it patented and publishes no retention force — no mount on this page publishes one.
What is not published
No phone compatibility of its own — that belongs to the case — no retention force, no stated vibration damping (Quad Lock sells a separate damper, not mentioned here), no waterproofing, and no case price. At $43.94 before a case, that last omission is the one to resolve before buying.
Availability
Read on the day this page was built: $44 at the American Amazon shop.
Read from Keepa on the day this page was last revised; stock and price both move without notice.
Prices quoted in this text were read on 2026-10-06. The live price is at the top of the page.
