Internal Wheel Truing

Internal Wheel Truing — $45

Internal wheel truing is the same precision spoke adjustment as our standard truing service ($25), but on wheels where the spoke nipples are hidden inside the rim rather than accessible from the outside. This design is standard on carbon deep-section wheels, most aero road wheelsets, and a growing number of premium aluminum rims. The nipples sit on the inner rim bed — you can’t see them or reach them without removing the tire and rim tape first. That extra disassembly is why internal truing costs $40 instead of $25.

The truing itself is identical — we’re still adjusting individual spoke tensions to bring the rim into lateral and radial true. But accessing internal nipples turns a 15-minute job into a 30-40 minute one because of the tire removal, rim tape removal, nipple access with specialized tools, and then re-taping and re-sealing everything when we’re done. If you’re running tubeless, that re-seal is critical — we handle it as part of the service.

What’s Included

Internal truing covers everything in a standard true, plus the additional access work required for internal nipple wheels:

• Tire removal: We deflate and remove the tire — clincher or tubeless — from the rim. On tubeless setups, we’re careful to preserve the tire’s bead seal as much as possible. If the sealant is old and dried, we’ll clean it out during the process.
• Rim tape removal: The tubeless or rim tape comes off to expose the spoke nipple access holes on the inner rim bed. We inspect the tape condition during removal — if it’s worn, stretched, or no longer sealing properly, we’ll recommend replacement.
• Wheel inspection: Before adjusting anything, we inspect the rim for damage, check for broken spokes, and assess whether truing alone will solve the problem. Carbon rims get extra scrutiny — a carbon rim with impact damage needs a more careful assessment than aluminum because carbon failure modes are different.
• Truing stand setup: The wheel goes into the stand and we set indicators for lateral (side-to-side) and radial (up-and-down) runout, same as any truing job.
• Lateral and radial truing: Using internal spoke nipple tools — typically a long-reach driver that fits down through the rim — we adjust each nipple in small increments. The technique is the same as external truing, but the tool access is more restrictive. We work to bring lateral deviation under 0.5mm and minimize radial hops.
• Dish check: We verify the rim sits centered between the hub flanges. Aero wheels with deep rim profiles can mask a dish problem that’s only noticeable under load — we measure rather than eyeball it.
• Tension assessment: We check spoke tension across the wheel. Carbon wheels are especially sensitive to over-tensioning — the manufacturer typically specifies a maximum spoke tension (often around 100-130 kgf), and exceeding it risks damaging the rim. We stay within spec.
• Spoke stress relief: After adjustment, we relieve wind-up stress in the spokes to prevent the wheel from shifting out of true on the first ride.
• Rim tape reinstallation: We re-apply rim tape, ensuring full coverage of all spoke holes and proper adhesion to the rim bed. If the original tape is no longer viable, we replace it with fresh tape matched to your rim width.
• Tubeless re-seal (if applicable): For tubeless setups, we remount the tire, re-seal the bead, add fresh sealant if needed, and inflate to seat the tire. We verify the seal holds before the wheel leaves the stand.

Why Internal Nipples Exist

If internal nipples make truing harder, why do wheel manufacturers use them? There are legitimate engineering reasons:

• Aerodynamics: External nipples sit in the airstream at the rim’s outer edge. On a deep-section aero wheel spinning at 30+ mph, those nipples create measurable drag. Internal nipples allow a smooth, uninterrupted rim profile that slips through the air more cleanly. This is the primary reason most carbon aero wheels use internal nipples.
• Rim strength: With internal nipples, the spoke holes on the outer rim wall can be smaller (just big enough for the spoke to pass through) rather than large enough for a nipple to seat in. Smaller holes mean less material removed from the braking surface or tire bead area, which can improve rim durability.
• Tubeless compatibility: Fewer and smaller holes on the outer rim bed means less area to seal for tubeless setups. Some rim designs with internal nipples only need tape over the small spoke pass-through holes rather than larger nipple seats, which can improve tubeless reliability.
• Aesthetics: Internal nipples give the wheel a cleaner look — no visible hardware on the rim face. This matters more for some riders than others, but it’s a factor in the premium wheel market.

The trade-off is serviceability. External nipple wheels are faster and cheaper to true. Internal nipple wheels require more time and specialized tools. Neither system is better or worse — they serve different priorities.

Carbon Wheel Considerations

Most wheels that come in for internal truing are carbon, and carbon rims have specific truing considerations that aluminum doesn’t:

• Maximum spoke tension limits: Carbon rims have a published maximum spoke tension — typically 100-130 kgf depending on the manufacturer and rim model. Exceeding this can crack the spoke bed or delaminate the carbon layup around the nipple seat. We use a tension meter and stay within the manufacturer’s spec.
• Impact damage assessment: Carbon doesn’t dent like aluminum — it cracks, delaminates, or fractures. A carbon rim that took a hard hit might look fine on the surface but have internal damage that makes it unsafe. If we suspect impact damage, we’ll recommend a professional inspection before truing. Truing a structurally compromised carbon rim won’t fix the underlying problem and could mask a safety issue.
• Nipple material: Many carbon wheels use brass or aluminum nipples. Aluminum nipples are lighter but can corrode and seize against the carbon rim bed, especially in humid conditions like Raleigh’s climate. If a nipple is seized, forcing it risks cracking the carbon — we use penetrating oil and patience rather than brute force.
• Asymmetric spoke patterns: Some carbon aero wheels use non-radial or asymmetric lacing patterns that create different tension profiles across the wheel. We account for this during truing — these wheels aren’t trued the same way as a standard 3-cross pattern.

How to Tell If Your Wheel Has Internal Nipples

Not sure which type your wheel has? Here’s a quick check:

Remove the tire (or look under the rim tape if you can). If you see the hex or slot heads of spoke nipples sitting in the inner rim channel, you have internal nipples. If the inner rim bed is smooth with only small holes where the spokes pass through, your nipples are external — visible on the outside face of the rim between the tire beads.

Or just bring the wheel in. We can tell you in a few seconds without removing anything.

Related Wheel Services

Internal truing often pairs with other wheel work:

• Standard Wheel Truing — $30: For wheels with external spoke nipples — the faster, less expensive truing option when your wheel design allows it.
• Tubeless Setup — $25: Since we’re already removing the tire and rim tape for internal truing, adding a fresh tubeless setup at the same time saves you a separate service visit.
• Front Hub Bearing Overhaul — $30: With the wheel off the bike, it’s a convenient time to check and service the hub bearings.
• Rear Hub Bearing Service — $40: Same idea — hub service pairs naturally with truing since the wheel is already in the stand.
• Tire Installation & Flat Repair — $15: If you need new tires mounted, we can do it while we have the tire off for internal truing — no extra removal step needed.

View all our wheel services for the complete list, or check our tune-up packages that bundle multiple services at a better price.

Pricing

Service	Price
Internal Wheel Truing	$45
Standard Wheel Truing (external nipples)	$25
Rim Tape Replacement (if needed)	Varies by rim width
Spoke Replacement (if needed)	Varies by spoke

The $40 covers the full internal truing process — tire removal, rim tape removal, lateral and radial truing, dish verification, tension check, stress relief, rim tape reinstallation, and tubeless re-seal if applicable. Replacement tape and spokes are additional if needed. We stock common tubeless tape widths and can order specific spoke lengths for most wheelsets within a day or two.

Get Your Aero Wheels Dialed

Internal truing takes a bit longer than a standard true, but the result is the same — a wheel that spins straight with no wobble and no brake rub. Use the booking buttons in the sidebar to schedule at either location, or stop by either Raleigh location — 6300 Creedmoor Rd #138 or 8480 Honeycutt Rd #126 (Lafayette Village). You can also reach us through our contact page. Most internal truing jobs are completed same-day.