What is the difference between the L2 and S2 options other than the (up to right) angle options on the L2?

The S is Straight and the L is L-shaped. Your wording of the question suggests you may think the L2 gives you an option of straight or 90 degrees, but that is not the case; it is fixed in the L-shape. I find it easier to apply a bit of force to seat the chuck with the L2 shape, but to be honest, it seats with so little pressure that the straight would probably be fine. There might be places where access requires a straight-in approach, but probably not on any car wheel I've seen. Maybe reading the reviews of the S2 would reveal reasons for the straight chuck.

Is there a combo pack with both the straight and 90 degree? Airing my truck tires would require both. I don't need two of each.

Dude, this seller is sitting on the patent but won't build the proper double end air chuck we're familiar with. He's too busy tinkering with locking mechanisms but not reinventing, therefore it's completely useless in function. Go fish!

I can’t fill my motorcycle tire with air at a gas station air pump because the hose head is not in L shape. Would this air chuck help?

Yes, but I doubt the station would appreciate you unscrewing their existing chuck and screwing this one on as a replacement.

Does this work with presta valves?

The Lightning L2-Series is compatible with Schrader valves only. If you are looking for one with both Presta and Schrader abilities, our JACO Lightning L3-Series chuck works on both.

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Description

⚙️ Lock, Inflate, Release — The Ultimate Tire Air Chuck Experience

OPEN FLOW POWER - Designed for pneumatic tire gauges and inflators, this open flow chuck guarantees unrestricted airflow for rapid, accurate inflation.
BUILT TO OUTLAST - Crafted from military-grade solid steel and backed by a lifetime warranty, this tool is your tire inflation partner for life.
INSTANT LOCK SEAL - Patented 90° AirLock nozzle ensures a flawless, airtight grip on Schrader valves with a simple push—no fumbling, no leaks.
360 SWIVEL FREEDOM - Right-angle head with full rotation eliminates hose kinks and tension, extending tool life and your workflow smoothness.
ZERO AIR LOSS QUICK RELEASE - Detach instantly without wasting a single PSI thanks to the smart quick-release button—efficiency meets precision.

The JACO Lightning L2-Series Tire Air Chuck is a professional-grade, open flow air chuck featuring a patented 90° self-locking nozzle and 360° swivel tip for effortless, airtight tire inflation. Designed for use with pneumatic tire gauges, it offers zero air loss quick-release and is built from military-grade steel, backed by a lifetime warranty—perfect for millennial pros who demand efficiency and durability in their automotive tools.

Specifications

Manufacturer	JACO Superior Products
Brand	JACO Superior Products
Model	Lightning L2-Series
Item Weight	3.2 ounces
Package Dimensions	4.41 x 2.05 x 0.79 inches
Item model number	L2-Series
Manufacturer Part Number	L2-Series
Mirror Adjustment	Open Flow
Special Features	Features 90 degree body with fully rotational swivel & built to last from military-grade solid steel, Open flow air chucks require setup with tire gauge or inflator (1/4 inch NPT) to control air flow with precision from air compressor for tire inflation. Not recommended to connect directly to air compressor hose., Patented "AirLock" internal locking system provides 100% air tight seal to tire valve stem, Quick-release valve quickly disconnects chuck from tire with absolutely no air loss
Safety Rating	NIST, ANSI

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