When I first set out to cycle across America in 2022, I knew my equipment would be pushed to the limit. But after 12,800+ miles on the saddle using my Riese & Muller Super Charger 2, I’ve encountered a maintenance issue that every long-distance e-biker or analog cyclist needs to have on their radar: rim fatigue.

Recently, while preparing my Riese & Müller e-bike for my next major tour, a 5,800+ mile solo journey from Florida to Los Angeles, I discovered that even the sturdiest and best gear has a lifespan.

After a safety audit by Master Mechanic David of Contes Bikeshop in Washington DC, it was clear that my rims had reached their limit and needed a full replacement.

Why Rims Crack (And Why E-Bikers Should Care)

For most casual cyclists, a rim might last a lifetime. But for those of us who treat our e-bikes like long-haul vehicles under the most demanding circumstances, the physics change.

1. The Weight Factor: Between the motor, the battery, and the many pounds of touring gear I carry for cross-country treks, my wheels are under constant, heavy compression.
2. Motor Torque: Unlike a standard bike, an e-bike motor applies force to the rear wheel every time you accelerate or climb a steep grade.
3. Cyclic Loading: 12,800 miles represents millions of wheel rotations. Each rotation is a "cycle" that slightly flexes the aluminum around the spoke nipples. Eventually, that metal fatigues, leading to the dreaded "nipple pull-through" or hairline cracks in the spoke bed.

Lessons from 12,800 Miles

If you are planning a tour or simply racking up serious commuter miles, here is my advice:

• Don’t just "check" your tires—inspect your spoke bed. Use a flashlight to look for tiny, spider-web lines radiating from where the spoke meets the rim.
• Listen to your bike. A wheel that suddenly won't stay "true" (straight) despite repeated adjustments is often a sign that the rim is beginning to fail structurally.
• Invest in quality components. When I replaced my wheels for this upcoming tour, I opted for rims with reinforced spoke beds and higher hole counts (like 36 spokes) to better distribute the load.

Cycling across the country is an incredible experience, but it’s only possible if you can trust the two circles of aluminum beneath you. Safety always comes first. And, you want to seek the opinion of a qualified bike mechanic.

As I geared up for the 2026 tour with my trusted R&M Supercharger 2, I’m glad I caught my cracks in the shop rather than on a remote stretch of highway in the desert.

See you on the road!