Slime Tire Inflator Jr. 40059 review

The Slime Tire Inflator Jr. (40059) is a small, 12-volt accessory-socket inflator built around a manual switch and analog dial. The manufacturer's current product page describes it as a mid-size-car top-off tool and gives a 12-minute flat-to-full example. That is a Slime scenario, not a timed result from this review: the reviewed material does not specify the tire size, starting pressure, final pressure, temperature or test method behind it.

A simple vehicle-powered arrangement

The main buying condition is access to a suitable 12V vehicle accessory outlet. This is not a cordless pump with a rechargeable battery inside, a wall-powered garage unit or a clamp-powered compressor. Its listed power cord is 9.2 feet long; Slime's instruction sheet gives a total reach of 9.6 feet. That reach is measured from its power source to the valve, so check the location of the socket and the wheel that is hardest to reach. Slime does not publish an electrical current draw or a minimum socket rating in the materials reviewed here. Do not assume that every vehicle outlet will support every accessory just because it is marked 12V; check the vehicle manual and the inflator instructions for the exact item in hand.

Slime lists an on/off switch, an LED work light and a 0–60 PSI dial. The page documents the main use as a car tire and depicts the unit at a bicycle tire; its product taxonomy also tags bicycle use. Its stated accessory set includes ball and raft inflation adapters. The page does not identify a separate Presta adapter or call the ball attachment a needle, so neither is counted as an included adapter here. If a bike valve or ball valve is the deciding detail, confirm the exact tip and valve connection before relying on the pictured use or buying a seller bundle.

The gauge scale is not a working-pressure rating

A dial that runs to 60 PSI is a display range, not proof that the compressor has a 60-PSI working-pressure rating. No maximum working pressure, gauge accuracy tolerance or automatic target-stop capability appears in the reviewed product page or specification sheet. The described control is a manual on/off switch; Slime does not document a preset-stop feature. Keep the operator present, monitor the pressure and use a separate suitable gauge for a reliable final check if the reading matters. Do not set a tire to its sidewall maximum as a substitute for the vehicle maker's recommendation. NHTSA directs drivers to the vehicle's tire-and-loading label or owner information for the correct pressure and recommends checking tires when cold; see its TireWise maintenance guidance.

The manual lists 0.60 CFM (17 L/min) at 0 PSI, but a zero-pressure flow value does not tell you how quickly this unit will raise a particular tire from one pressure to another. Slime's 12-minute example and zero-pressure flow rating answer different questions; neither is an independent performance test. No repeated-work duty limit, pressure-dependent flow curve, tire-size ceiling or per-charge capacity is established in the reviewed documentation. Those gaps matter if the job is more than occasional passenger-car maintenance.

How it compares with the Compact Tire Inflator

The closely named Slime Compact Tire Inflator (40060) is a separate SKU, not another name for the Jr. The two are both 12V analog models with press-on lever-lock heads and advertised mid-size-car scenarios, but their manual figures differ. The Jr sheet lists 0.60 CFM at zero pressure, a 9.2-foot power cord and 9.6 feet of total reach, with a 12-minute maker scenario. The Compact sheet lists 0.44 CFM, a 9.7-foot cord and 11.3 feet of total reach, with a 10-minute maker scenario. These are manufacturer specifications from separate source pages, not matched testing; the different advertised minutes do not establish that one will be faster on your tire. The Compact page also says its connection may be either an older green lift-to-lock lever or a newer black down-to-lock version depending on production date, while the Jr page shows a green lift-to-lock lever. The Compact offers more stated overall reach, while the Jr has the higher zero-pressure flow figure; choose by your actual outlet-to-valve path and verify the specific lever/version rather than treating the names or advertising as interchangeable.

Who should keep it on the list?

The 40059 is worth considering for an owner who wants a compact, vehicle-powered pump for occasional car-tire top-offs, values a visible dial and light, and is comfortable operating a manual switch. It is a poor evidence-based fit if built-in battery power, direct battery clamps, automatic pressure stopping, a known working-pressure ceiling, a confirmed Presta attachment or documented heavy-work duty limit is essential. The published car-tire scenario is useful context, but it is not a universal tire-size guarantee. Match the exact 40059 identity, inspect the seller's package, confirm outlet compatibility, follow the pump's own safety instructions and set pressure from the vehicle's cold-pressure label.

Slime Tire Inflator Jr. 40059 product information · Slime Tire Inflator Jr. instruction manual