What This Wrap Does
The 30-2191 is a flexible rubber sleeve that bundles two air lines and one electrical cable into a single managed run behind the cab. Instead of three separate hoses swinging free and slapping the deck plate, everything travels together inside one protective jacket. The rubber takes the abrasion so the hose and cable jacket do not.
Failure on an unwrapped setup is predictable. The service and emergency lines rub the catwalk edge or the frame rail, the outer cover wears through, and you get a slow air leak that only shows up when the tractor is loaded. The electrical cable is worse — chafe through the jacket and you are chasing intermittent trailer lights in the rain.
This one is 10 ft, which is the short option. It suits day cabs and short-wheelbase tractors where a 12 or 15 ft wrap leaves too much slack hanging low enough to catch. Measure the existing run from the cab-mounted glad hands to the trailer connection before you decide which length you need.
Why These Numbers Cross
Wraps like this are built to a common pattern rather than a truck-specific design, which is why several catalogue numbers land on the same physical item. Alliance lists N42AAPL15 for this style of combination air and electrical wrap. Aftermarket suppliers publish 30 2171 and 451098 for the same 3-in-1 rubber sleeve concept. Our headline number for it is 30-2191.
What actually has to match is length, internal capacity, and how the sleeve closes. A 3-in-1 wrap has to swallow two air hoses plus one seven-way cable without binding, and it has to open along its length so you can install it without pulling the glad hands off. Numbers that share those three attributes cross to each other regardless of whose label is on the bag.
Those numbers are listed for identification only. PartStop is not affiliated with, endorsed by, or authorised by Alliance or any other manufacturer. Use the cross-reference as a starting point, then confirm against the number printed on your old wrap or against the actual hose and cable diameters you are running.
Before You Order
Pull a tape on the existing run. Measure from where the lines leave the cab bracket to where they land at the trailer, with the tractor straight. If your current wrap is 12 or 15 ft and it sits correctly without sagging into the frame, the 10 ft version will be short. If it drags, 10 ft is the fix.
Check what you are bundling. Two air lines and one seven-way cable is the standard load for a 3-in-1. If you run a second electrical cable, a camera line, or oversized hose, verify the sleeve will close over the bundle before you commit. Cross-reference does not guarantee fitment — confirm by VIN or by the number on the part coming off.
30-2191 Cross-Reference & Interchange Numbers
These manufacturer and aftermarket numbers commonly cross-reference to 30-2191. Use them to identify the part — then confirm the exact fit by VIN or the number stamped on your old unit before you order. An interchange is a starting point, not a fitment guarantee.
| Brand / Line | Cross-Reference Numbers |
|---|---|
| Aftermarket | 30 2171, 451098 |
| Alliance | N42AAPL15 |
Frequently asked questions
Do I have to disconnect the air lines to install this wrap?
No. This style of wrap opens along its length and snaps around the existing bundle, so the glad hands and the seven-way plug stay connected. You work from one end to the other, feeding the hoses and cable in as you go. No special tools are needed.
Is 10 ft long enough for a sleeper tractor?
Often not. The 10 ft length is aimed at day cabs and short tractors where a longer wrap leaves slack that sags toward the frame. On a long-wheelbase sleeper the run from cab bracket to trailer is usually longer. Measure your existing lines before ordering rather than assuming.
Does 30-2191 replace Alliance N42AAPL15?
It is listed as a cross-reference for that number and for aftermarket numbers 30 2171 and 451098. Those numbers appear for identification only and imply no affiliation with the brands that own them. Confirm the match by length and by the bundle it has to cover before you install.
Not sure it fits? We check before you pay.
Run your VIN and we’ll match parts to your exact truck, or call the counter — a person who knows trucks verifies fitment by OEM number before the order ships. No wrong-box returns.
More cross-reference guides
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