Tubeless Setup Guide - Conversion & Magic Milk Sealant

Master tubeless tyre setup with our comprehensive guide. Learn how to convert to tubeless, choose the right Magic Milk sealant formula, install rim tape, and maintain your tubeless system for maximum performance and reliability.

Why Go Tubeless?

Tubeless tyres offer significant advantages over traditional inner tubes:

Fewer punctures - Sealant automatically seals small punctures (up to 8mm) as they happen. Most riders experience 80-90% fewer flats.
Lower tyre pressure - Run 10-20% lower pressure for better traction and comfort without pinch flat risk.
Lighter weight - Eliminating the inner tube saves 70-100g per wheel.
Better ride quality - Lower pressure improves comfort and grip, especially on rough terrain.
Improved rolling resistance - Tubeless tyres roll faster than tube-type tyres at the same pressure.
Instant puncture sealing - Small punctures seal themselves in seconds while riding.

What You'll Need for Tubeless Conversion

Essential Components

Professional Tubeless Conversion System (includes rim tape, valves, and tools)
Tubeless-ready tyres (or tubeless-compatible tyres)
Tubeless-ready rims (or tubeless-compatible rims)
Magic Milk sealant (choose the right formula - see below)
Tubeless valves (Presta, appropriate length for your rim depth)
Tubeless rim tape (width matching your rim's internal width)
Lifetime Warranty Professional Tyre Levers
Floor pump or compressor (for initial bead seating)
Valve core tool
Sealant injector or bottle with nozzle

Choosing the Right Magic Milk Formula

We offer three Magic Milk sealant formulas, each optimized for specific applications:

1. Magic Milk - Original Formula Inner Tube Sealant

Best for: Inner tubes (butyl and TPU)
Features: Seals punctures up to 3mm, prevents flats before they happen
Lifespan: 6-12 months inside tubes
Use case: Riders who prefer tubes but want puncture protection

2. Magic Milk Hi-Fibre - Professional Race Sealant

Best for: Tubeless tyres (road, gravel, MTB)
Features: Contains fibre strands for faster sealing of larger punctures (up to 8mm), race-proven performance
Lifespan: 3-6 months (check and top up regularly)
Use case: Serious riders who demand maximum puncture protection and performance
Recommended amount: 60-90ml (road), 90-120ml (gravel), 120-150ml (MTB)

3. Magic Milk Hi-Fibre - Professional Inner Tube Formula

Best for: TPU and butyl inner tubes
Features: Specifically designed for tubes, prevents punctures proactively
Lifespan: 6-12 months
Use case: Riders using Race Formula TPU tubes or standard tubes who want preventative protection

Tubeless Conversion Step-by-Step

Step 1: Prepare the Rim

Remove existing tyres and tubes - Use Lifetime Warranty Professional Tyre Levers to remove the tyre from the rim. Remove the inner tube completely.
Clean the rim thoroughly - Remove all old rim tape, dirt, grease, and debris. Use isopropyl alcohol on a clean cloth to wipe the rim bed. Let it dry completely (5 minutes).
Inspect the rim - Check for damage, cracks, or sharp edges that could puncture the tyre or tape. File down any sharp spoke holes or burrs.
Check rim compatibility - Ensure your rims are tubeless-ready or tubeless-compatible. Look for "TLR" (Tubeless Ready) or "UST" markings. Non-tubeless rims can work but may require extra tape layers.

Step 2: Install Tubeless Rim Tape

Select correct tape width - Measure your rim's internal width. Tape should be 2-4mm wider than the internal width to ensure it wraps slightly up the rim walls. Common widths: 21mm (road), 25mm (gravel), 30mm (MTB).
Find the starting point - Start taping opposite the valve hole. This ensures the valve hole area has double coverage for better sealing.
Apply the first layer - Peel back 10cm of backing. Press the tape firmly into the center of the rim bed. Pull the tape tight (but not stretched) as you work around the rim. Use your thumbs to press it down firmly, ensuring no air bubbles or wrinkles. Overlap the starting point by 10-15cm.
Smooth out bubbles - Use your thumbs or a plastic card to press out any air bubbles, working from the center outward.
Apply a second layer (optional) - For non-tubeless-ready rims or extra security, apply a second layer of tape using the same technique.
Pierce the valve hole - Locate the valve hole by feeling through the tape. Use a sharp tool (awl, small screwdriver, or valve itself) to pierce the tape at the valve hole. Make the hole just large enough for the valve stem—too large and air will leak.

Step 3: Install Tubeless Valve

Select correct valve length - Valve stem should be long enough to extend through the rim and allow easy access for pumping. Common lengths: 40mm (shallow rims), 60mm (standard), 80mm (deep-section rims).
Insert the valve - Push the valve stem through the pierced hole from inside the rim. The rubber base should sit flush against the rim bed.
Tighten the lock ring - Screw the lock ring (nut) onto the valve from the outside. Tighten firmly by hand—don't over-tighten or you'll damage the tape. The valve should be perpendicular to the rim.
Check the seal - The rubber base should create an airtight seal against the tape. If air leaks around the valve, the hole may be too large or the lock ring isn't tight enough.

Step 4: Mount the Tyre

Check tyre direction - Most tyres have a directional tread pattern. Look for an arrow on the sidewall indicating the direction of rotation. Mount accordingly.
Install the first bead - Place one side of the tyre bead into the rim channel. Work your way around the rim, pushing the bead into the center channel. This should be easy by hand.
Install the second bead - Starting opposite the valve, push the second bead into the rim. Work your way around toward the valve. The last 10-20cm will be very tight—this is normal. Use tyre levers carefully if needed, being careful not to damage the rim tape.
Position the valve - Push the valve up into the tyre to ensure the rubber base is seated properly against the rim.
Check bead seating - Look at both sides of the tyre to ensure the bead is sitting in the rim channel evenly all the way around.

Step 5: Add Sealant

There are two methods for adding sealant:

Method 1: Through the valve (easier, less messy)

Remove the valve core using a valve core tool (turn counter-clockwise)
Attach a sealant injector or bottle with nozzle to the valve stem
Inject the appropriate amount of Magic Milk Hi-Fibre Professional Race Sealant:
- Road tyres (23-28mm): 60-90ml per tyre
- Gravel tyres (32-45mm): 90-120ml per tyre
- MTB tyres (2.0-2.5"): 120-150ml per tyre
- Plus/Fat tyres (2.6"+): 150-200ml per tyre
Reinstall the valve core (turn clockwise until snug)

Method 2: Before mounting second bead (messier but faster)

With only one bead mounted, pour the sealant directly into the tyre
Mount the second bead quickly to minimize sealant spillage
This method is faster but messier—have rags ready

Step 6: Inflate and Seat the Bead

Initial inflation - Inflate the tyre quickly to seat the beads. You need a high volume of air delivered fast. Options:
- Floor pump: Pump vigorously. May require 100+ strokes.
- Compressor: Best option. Set to 40-60 PSI and blast air in.
- CO2 inflator: Use 2-3 cartridges (25g) for quick seating.
- Tubeless inflator/booster: Specialized tool that stores compressed air for quick release.
Listen for the "pop" - As the beads seat into the rim hooks, you'll hear loud popping sounds. This is normal and indicates the bead is seating properly.
Inflate to maximum pressure - Inflate to the tyre's maximum rated pressure (check sidewall). This ensures the beads are fully seated.
Check bead seating - Look at the bead line on both sides of the tyre. It should be evenly positioned just above the rim all the way around. If uneven, deflate slightly and massage the tyre to help it seat.

Step 7: Distribute Sealant

Rotate the wheel - Spin the wheel and rotate it in all directions to distribute sealant evenly around the inside of the tyre.
Shake and tilt - Tilt the wheel side to side, ensuring sealant coats the entire inner surface.
Lay the wheel flat - Lay the wheel flat for 30 seconds on each side to allow sealant to pool and seal any small gaps.

Step 8: Check for Leaks

Spray soapy water - Mix dish soap and water in a spray bottle. Spray the tyre bead, valve, and tyre surface. Look for bubbles indicating air leaks.
Common leak points:
- Valve base (tighten lock ring or reseat valve)
- Bead area (add more air pressure or massage bead)
- Tyre sidewall (small weeps are normal and will seal within minutes)
Let it sit - Leave the wheel for 10-15 minutes. Small leaks should seal themselves as the sealant works.
Re-check pressure - After 30 minutes, check pressure. Some air loss is normal as sealant seals micro-gaps.

Step 9: Adjust to Riding Pressure

Reduce to riding pressure - Once the beads are seated and leaks are sealed, reduce pressure to your desired riding pressure:
- Road: 70-100 PSI (tubeless allows 10-15 PSI lower than tubes)
- Gravel: 35-55 PSI
- MTB: 20-35 PSI (varies by rider weight and terrain)
Test ride - Take a short test ride (5-10 minutes) to ensure everything is working properly.
Re-check pressure after 24 hours - Tubeless setups can lose 5-10 PSI in the first 24 hours as everything settles. Top up as needed.

Tubeless Maintenance

Regular Checks

Check pressure before every ride - Tubeless tyres lose air faster than tubes (2-5 PSI per week is normal)
Shake the wheel monthly - You should hear sealant sloshing inside. If not, it's time to top up.
Top up sealant every 3-6 months - Sealant dries out over time, especially in hot, dry climates. Remove valve core and inject 30-60ml of fresh Magic Milk.
Replace sealant annually - Once per year, remove the tyre, clean out old sealant, and start fresh.

Sealant Top-Up Procedure

Remove valve core with valve core tool
Inject 30-60ml of Magic Milk Hi-Fibre through the valve
Reinstall valve core
Inflate to riding pressure
Rotate wheel to distribute sealant

Troubleshooting Common Issues

Problem: Tyre won't seat

Solution: Use more air volume/pressure. Try a compressor or tubeless inflator. Ensure rim tape is smooth with no wrinkles.

Problem: Air leaking from valve

Solution: Tighten valve lock ring. Check that valve hole in tape isn't too large. Reseat valve with fresh tape if needed.

Problem: Sealant spraying everywhere during inflation

Solution: This is normal. Have rags ready. The sealant will seal the leaks within seconds.

Problem: Tyre losing pressure overnight

Solution: Check for leaks with soapy water. Add more sealant. Ensure beads are fully seated. Some air loss (5-10 PSI per week) is normal.

Problem: Sealant dried out

Solution: Remove tyre, clean out dried sealant, re-tape if needed, and start fresh with new sealant.

Tubeless Setup Pro Tips

Use a compressor if possible - Makes bead seating much easier and more reliable
Don't skimp on sealant - Use the recommended amount. Too little won't seal punctures effectively.
Refresh sealant regularly - Dried sealant can't seal punctures. Top up every 3-6 months.
Carry a spare tube - For catastrophic failures (large cuts, sidewall damage), a tube is your backup plan.
Magic Milk Hi-Fibre lasts 3-6 months - Check and top up regularly for best performance
Clean valve cores - Sealant can clog valve cores. Remove and clean them every few months.
Store wheels upright - This prevents sealant from pooling in one spot and drying unevenly.

Need More Help?

Still have questions about tubeless setup? Contact our expert support team for personalized guidance. We're here to ensure you get the most from your VELO-TOOL products.

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