TPMS for Class A Motorhomes — coach, tag axle and toad.
A Class A coach rides on high-pressure tires carrying tens of thousands of pounds, and a steer tire failure at highway speed is the one nobody wants. A Class A TPMS shows every tire — steer, drive, tag and toad — on one screen in the cockpit.
- 6–12tires incl. toad
- 217 PSIfor 22.5-inch tires
- 40 ft+with signal booster
- Per axlealarm limits
Kits for gas coaches, diesel pushers and toads
Pick by tire count — coach plus toad — and your cold inflation pressure.
8/10/12 Wheels · Up to 217 PSI
Grundig S08 Heavy-Duty TPMS
Covers a tag-axle diesel pusher (8) or any coach plus toad (10–12) with 217 PSI sensors.
- 8-wheel mode for tag-axle coaches
- 10/12-wheel modes with toad
- Signal booster option
6 Sensors · Up to 217 PSI · Solar
Solar Powered TPMS
Six sensors for a gas coach or a pusher without a tag axle, with a solar display — no cable to the dash.
- Steer + four drive duals
- 217 PSI version for pushers
- Solar + Type-C
6–36 Wheels · 200 PSI · Solar
GRUNDIG 550S Solar TPMS
Set separate alarm limits for steer, drive, tag and toad tires — each runs its own pressure.
- Independent per-axle alarms
- Expandable kits with booster
- Tire position swap on screen
6–110 Wheels · 200 PSI · Touch Screen
GRUNDIG 860 TPMS
Save your toad and a cargo trailer as separate profiles and switch on the 5-inch touch screen.
- Multi-profile switching
- 12V/24V powered
- Scales with your setup
Where Class A tire problems hide
The tire you can least afford to lose
Front tire failures affect steering directly. Catching a slow leak or a hot steer tire early keeps you in control of a 30,000-lb coach.
The axle everyone forgets
Tag axle tires sit behind the drive duals and are rarely checked at fuel stops. They still carry real load and still fail.
Coaches sit, tires leak
Between trips, tires lose pressure and develop flat spots. A TPMS gives you a full cold reading before you pull out of the storage lot.
Inflate by weight, not by guesswork: the right pressure for a Class A tire depends on the actual axle weight. Weigh your coach loaded, use your tire maker's load-inflation table, then set your TPMS alarm limits around those numbers.
Which TPMS fits your Class A motorhome?
Steer + drive tires first, then add a tag axle and toad if you have them.
| Coach setup | Tires | Recommended kit |
|---|---|---|
| Gas Class A (e.g. Ford F-53 chassis) | 6 | Solar Powered TPMS or GRUNDIG RV TPMS (6-wheel, if under 116 PSI) |
| Diesel pusher, no tag axle | 6 | Solar Powered TPMS (217 PSI version) |
| Diesel pusher with tag axle | 8 | Grundig S08 (8-wheel) |
| 6-tire coach + toad | 10 | Grundig S08 (10-wheel) |
| Tag-axle coach + toad | 12 | Grundig S08 (12-wheel) or 550S |
| Coach + toad or cargo trailer (swapping) | 10–14 | GRUNDIG 860 with saved profiles |
Not sure which pressure to set? Our RV safety checklist covers a full pre-trip tire check.
TPMS for Newmar, Tiffin and other diesel pushers
Grundig sensors mount on the valve stems and run on their own monitor, so they fit any coach regardless of chassis.
Newmar TPMS
Dutch Star, Ventana, New Aire and King Aire coaches often run tag axles — plan on 8 sensors for the coach, 12 with a toad.
Tiffin motorhome TPMS
Allegro, Allegro Red, Phaeton and Allegro Bus coaches: choose 217 PSI sensors for diesel models on 22.5-inch tires.
Freightliner & Spartan chassis
Most diesel pushers ride on these chassis; tire count, not chassis, decides the kit size.
Other brands
Winnebago, Thor, Entegra and more — see our RV TPMS by brand guide.
Installing a TPMS on a Class A coach
No tire removal, no dealer visit:
- Power on the monitor and mount it in the cockpit where you can see it without looking away from the road for long.
- Set limits per axle from your weight-based inflation table — steer, drive, tag and toad usually differ.
- Fit sensors in the on-screen order with metal valve stems or rigid extensions on the inner duals.
- Install the signal booster near the rear of the coach if you monitor a tag axle or toad.
- Leak-check and test drive to confirm every position reports.
TPMS for Class A Motorhome FAQ
Do I need to monitor the tag axle on my diesel pusher?
Yes. Tag axle tires carry part of the rear load and are easy to overlook because they sit behind the drive duals. A diesel pusher with a tag axle has 8 tires — the Grundig S08's 8-wheel mode covers all of them.
Can I monitor my toad (towed car) too?
Yes. Add four sensors for the toad: a 6-tire coach plus toad is 10, and a tag-axle coach plus toad is 12. The S08 covers both in its 10- and 12-wheel modes, all on one monitor in the cockpit.
What PSI do Class A motorhome tires run?
Diesel pushers on 22.5-inch tires often run around 100–120 PSI cold, while gas coaches on 19.5-inch tires typically run lower. Use your coach's weight-based inflation table, and choose 217 PSI sensors if you run near or above 110 PSI.
My coach came with a factory TPMS. Do I still need one?
Some newer coaches include a factory system for the coach itself. If yours does not cover the toad or a trailer, or doesn't show tire temperature at every position, an aftermarket Grundig kit adds that on its own display.
Where should the signal booster go on a 40-foot coach?
Mount it near the rear of the coach, on a constant 12V source, so it bridges the tag axle and the toad to the cockpit monitor.
Should I check pressures after storage?
Yes. Coaches that sit for weeks lose pressure. Wake the monitor before you leave and compare every reading to your cold target — the TPMS makes a full walk-around gauge check much faster.
More guides: RV TPMS · 5th wheel & toy hauler TPMS · Compare all models
Steer, drive, tag and toad — all on one screen.
From gas coaches to tag-axle diesel pushers, there's a Grundig TPMS built for your Class A.
Newmar, Tiffin, Freightliner and Spartan are trademarks of their respective owners. Grundig-auto is not affiliated with these manufacturers; names are used only to describe fitment.