# Service bulletin KTB2602

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 11031351
- Published by NHTSA: 2026\-04\-15
- Manufacturer's number: KTB2602
- Manufacturer's date: 2026\-02\-19
- NHTSA component: WHEELS

## NHTSA's summary

To fully exploit the potential of a Supersport motorcycle, appropriate performance tires are required. In our opinion, the Michelin Power Cup 2 best meets this requirement. The disadvantage of these tires is, that there is a low\-temperature threshold at which rubber loses elasticity and becomes brittle, called the glass transition point. Rubber breakdown in the cold can manifest as a tiny crack or many larger cracks around the tire. To avoid damage, the Michelin Power Cup 2 must not be handled below 41°F \( 5°C \) in transport and storage.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11031351-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11031351-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Wheels

## Vehicles listed

- 2026 KTM 990 DUKE R
- 2026 KTM 990 RC R

JSON: [/v1/bulletins/11031351](/v1/bulletins/11031351)

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