There is a special kind of silence in the pit lane when a driver watches a tire peel off the wheel halfway through an A-main. It is usually followed by the words "but I glued those." Yes, and the mold release on the bead was very happy to hold onto that glue while the tire left without it.
Gluing tires is not hard, but it is unforgiving. Skip the cleaning, rush the cure or flood the bead and you will be doing it again in the pits. This guide covers the method Pro-Line and Horizon Hobby publish, the reasons tires come unglued, and a race-week routine so your rubber stays on the rims from practice through the main.
The Short Answer
To glue RC tires so they stay on, clean the bead and wheel with alcohol to remove mold release, seat the tire, glue the bead in small sections with a band holding it tight, and let the CA cure overnight before racing.
- Most failures come from skipped cleaning, poorly seated beads, too much glue or running before the glue has cured.
- Use hobby tire CA of medium viscosity; it gives you time to work the bead before it sets.
- Glue one side of every tire, let it dry, then do the other side.
- Glue the night before a race and check beads between rounds.
1. Why Tires Come Unglued (and the Prep That Prevents It)
Nearly every unglued tire we see at the shop failed for one of a handful of reasons. EuroRC's tire gluing guide puts mold-release residue at the top of the list, followed by poorly seated beads, running the tires before the glue has reached full strength, and old, dried-out glue. Axial adds the two mistakes it sees most: too much glue and going too fast.
Clean off the mold release
Tires and wheels come out of molds coated in release agent, and glue does not stick well to it. Axial's gluing guide recommends wiping the bead areas with denatured or rubbing alcohol and letting them dry, and specifically warns against ordinary household cleaners such as window cleaner. Use a lint-free rag, wipe the tire bead and the wheel's bead channel, and do not touch the cleaned surfaces with greasy fingers.
Vent the wheels and trim the foam
Horizon Hobby's how-to says to ream two holes on opposite sides of the wheel so the tire can breathe, unless the wheels are already vented. On 1/8 scale tires it suggests punching holes in the tread instead. If you are using open-cell (white) foam, trim all four edges with scissors so the foam does not bunch up in the sidewalls; closed-cell (blue) foam needs no trimming.
Test fit before any glue comes out
Install the foam, push the tire onto the wheel and seat both beads in the wheel's channels. Check directional tread and build matching left and right pairs. Spin the assembly to make sure it runs true, then roll the tire between your palms to settle the bead and foam. Any bulge or gap you leave now is where the tire will let go later.
2. The Gluing Method That Works
This is the method Pro-Line demonstrated with Ty Tessmann on LiveRC and that Horizon Hobby repeats in its guide. It glues the bead in small sections so you never have more glue setting than you can control.
Step by step
- Band it. Put a tire band around the outer edge of the side you are gluing. Axial's guide uses two wide bands per tire, one on each side, and notes that the tighter the tire is held to the wheel, the stronger the bond.
- Lift a small section of bead away from the rim. EuroRC suggests working in sections of about 2 to 3 inches.
- Wet it with glue and let the bead drop back into place.
- Work around the tire. Axial suggests starting at 12 o'clock and moving to 6, then checking 3 and 9 o'clock after a few minutes and adding small drops where needed.
- Run a thin line of glue around the outer edge where the bead meets the wheel.
- Set it aside to dry, and repeat on one side of every tire in the set.
- Move the bands to the other side once the first side has dried, and repeat.
Pick the right viscosity
Tire glues are cyanoacrylate (CA), sold in different thicknesses. Medium is the safe choice for most people.
| Glue viscosity | How it flows | Best use on tires |
|---|---|---|
| Thin CA | Like water; wicks into tight gaps and sets fast | Experienced gluers with snug beads; touch-ups where it can wick in |
| Medium CA (a common tire-glue choice) | Like oil; more working time | Full mounting jobs; the best place for beginners to start |
| Thick or gel CA | Like gel; fills gaps, sets slowly | Spot repairs and gap filling, not full mounting |
Pro-Line says its Pro-Bond tire glue formula is tuned for the flow and dry time racers want, comes in a 0.7 oz (20 g) bottle and uses reusable snap-fit applicator tips.
Enough glue, not a flood
The Pro-Line method says wetting the bead with ample glue helps it slip back into place, while Axial warns that too much glue is one of the two biggest mistakes, alongside going too fast. Both are right: wet the bead fully, but do not pour glue into the channel. If glue runs onto the tread or wheel face, wipe it quickly with an alcohol-dampened rag.
3. Curing, Race-Day Checks and Re-Gluing
Most tires that come apart at the track were glued well and run too soon. CA is dry to the touch long before it reaches full strength, and a tire spinning at speed is a hard test.
Give it overnight
EuroRC puts handling time at roughly 5 to 10 minutes but full bond strength at 8 to 24 hours, and recommends gluing race tires the night before. That matches what we see: tires glued in the parking lot on race morning are the ones that let go in the main. Glue on Thursday or Friday for a Saturday race and you can stop thinking about it.
Check every bead
After the glue sets, gently pull the bead away from the wheel all the way around. If any section lifts, add a small drop and press it back down. Repeat the check between rounds at the track; EuroRC recommends a check after every 2 to 3 hours of run time. Catching a small lift early is a 30-second fix. Missing it means a flat-spotted tire flapping around the track.
Re-gluing a tire that has started to lift
Clean the lifted area with alcohol if it has dirt or fluid in it, let it dry, then glue that section the same way: lift, wet, drop, band. If a tire has come almost entirely off, it is usually quicker to clean both surfaces and glue it fresh than to patch it in pieces.
Store your glue properly
Old glue that has thickened in the bottle does not wick or bond like fresh glue. Keep the cap on and the tip clean, and replace a bottle once it starts to feel gummy. Fresh tips cost far less than a ruined set of race tires.
Conclusion
Glued tires come apart for boring reasons: mold release, unseated beads, glue floods and impatience. Clean with alcohol, vent the wheels, seat the beads, glue in small sections with a band on, do one side of every tire before the other, and let it cure overnight. Do that and the only thing coming off your wheels will be tread.
Pick up Pro-Line Pro-Bond tire glue, tips and bands, or browse our car and truck tires and wheels. If you would rather we handle it, ask about mounting at the Cumming showroom or contact us.
Gear Mentioned in This Guide
Pro-Line Glue Tips (3) for Pro-Bond Tire Glue
Fresh tips put a fine bead exactly where you want it.
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Pro-Line Tire Rubber Bands, Blue (4)
Hold the bead tight against the wheel while the glue sets.
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Traxxas Body Reamer, Aluminum Handle (3433X)
A sharp reamer for clean body-post holes and for venting wheels.
Shop nowFrequently Asked Questions
What is the best glue for RC tires?
Use a hobby-grade tire CA, ideally medium viscosity. Products made for tires, such as Pro-Line Pro-Bond, are designed for the flow and dry time needed to work a bead.
How long should RC tire glue dry before running?
CA is handleable within minutes, but full strength takes much longer. EuroRC cites 8 to 24 hours, so glue race tires the night before.
Why are my RC tires coming unglued?
The most common causes are mold-release residue left on the bead, a bead that was not fully seated, running before the glue fully cured, old or dried-out glue, and using too much glue or rushing the job.
What should I clean RC tires with before gluing?
Rubbing or denatured alcohol on a lint-free rag works well. Let the surfaces dry completely before gluing, and avoid household cleaners such as window cleaner, which Axial warns can keep glue from bonding.
Do I need to vent RC wheels?
Yes, if they are not already vented. Horizon Hobby recommends reaming two holes on opposite sides of the wheel so the tire can breathe. For 1/8 scale tires, it suggests punching holes in the tread instead.
Can I reuse wheels after removing glued tires?
Often, yes, if you can remove the old tire and glue cleanly. Inspect the bead channel first: a damaged or warped channel will not hold a new tire reliably. Clean the wheel with alcohol before gluing again.
