See It. Get It. RocStem.

 ⚠️ Attention: Due to high demand, some products are selling out quickly – secure alternatives now!
 ⚠️ Attention: Due to high demand, some products are selling out quickly – secure alternatives now!
 ⚠️ Attention: Due to high demand, some products are selling out quickly – secure alternatives now!

 📦 Vom 01.–15. August kein Versand – aber 10 % Extra Discount For everyone who still orders: Use the code: pause26 / Versand ab 17. August!
 📦 Vom 01.–15. August kein Versand – aber 10 % Extra Discount For everyone who still orders: Use the code: pause26 / Versand ab 17. August!
 📦 Vom 01.–15. August kein Versand – aber 10 % Extra Discount For everyone who still orders: Use the code: pause26 / Versand ab 17. August!
 📦 Vom 01.–15. August kein Versand – aber 10 % Extra Discount For everyone who still orders: Use the code: pause26 / Versand aa 17. August!

One simple movement. More space.

OUR PRODUCTS

INFORMATION CENTER

June 27, 2026

RocStem successfully tested according to DIN EN ISO 4210-5:2023

Rocker Parts GmbH has had its RocStem swiveling bicycle stem tested according to the current DIN EN ISO 4210-5:2023 standard. This testing will be used in the future to...

Expensive or good value? Function and quality trump price.

Discover the true value of function, quality, and everyday usability. A stem is an inconspicuous component – until it makes all the difference...

Usage profile „Sporty & Safe“ – That’s what our stems are made for.

Our stems are thoughtfully designed, made from high-quality materials, and safety-tested. But as with any high-quality component...

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       EXCELLENT  
   Based on 232 Bewertungen 
    
 
 
 
   
 
 
      Posted on Google  
   
   Patrick Schipper 
 16 September 2026
 
 
 Trustindex verifies whether the original source of the rating is Google. +1
Website ist richtig gut gemacht. Wir haben Model von unseren Bikes gesendet und nach kurzer Zeit die passenden Teile bestellt, die uns empfohlen wurden, sie kamen schon am nächsten Tag. Wir haben sie bei unserem E-Bike Händler einbauen lassen, alles hat perfekt gepasst. Wir sind begeistert von diesem Produkt und der Firma. Und alles passt noch in die Womogarage, Platz genug, siege Fotos. Somit benötigen wir keinen Fahrradanhänger nur 7m statt ca.8 m länge des Womo. Jutta und Patrick
  
 
     Posted on Google  
   
   Ands 12 
 September 8, 2026
 
 
 Trustindex verifies whether the original source of the rating is Google. I ordered two of each of the Z4 folding pedals and the RocStem Bend 35 swivel stem. Delivery arrived after three days. The stems are of excellent quality. The pedals still need to prove themselves over time, but they also make a very good impression. I can highly recommend both items for saving space when storing mountain bikes in the garage of my motorhome. The prices are completely justified.
  
 
     Posted on Google  
   
   Jörg Lucius 
 August 31, 2026
 
 
 Trustindex verifies whether the original source of the rating is Google. I'm truly impressed with how well the communication with Martin worked; all my questions were answered very quickly. I ordered everything he suggested for the handlebar conversion. The stem, including the extension, arrived very quickly, along with the assembly instructions. Everything fit perfectly, and I'm very happy. Thanks again! Highly recommended.
  
 
     Posted on Trustindex  
   
   A. Schmidt 
 August 22, 2026
 
 
 Trustindex verifies that the original source of the rating is Trustindex. +2
RocStem AiO - Swivel stem and accessories The purchased parts are high-quality and easy to assemble. Communication was quick and customer-friendly when problems arose. Shipping was super fast despite choosing the 10-day waiting option.
  
 
     Posted on Google  
   
   Heinrich Mook 
 August 19, 2026
 
 
 Trustindex verifies whether the original source of the rating is Google. I installed the RocStem Bend Max today. Excellent workmanship, easy installation. It does exactly what it's supposed to do – rotate the handlebars 90° and lock them in position.
  
 
     Posted on Trustindex  
   
   Thomas Schreiner 
 August 15, 2026
 
 
 Trustindex verifies that the original source of the rating is Trustindex. +0
Stem "straight handlebars"„ We spent three weeks on Elba and thoroughly tested the stem(s) on the truly bare trails of the Legend Cup on Monte Calamita. The result – fantastic!! The stem performed perfectly on rough terrain without any weaknesses, loosening, or anything else! For us, this means – perfect execution of an extremely good idea!!! Huge respect to Martin and his company Rocker Parts!! 👍👍👍💪💪💪💪🤘🤘🤘 Best regards (still from Elba), Thomas
  
 
     Posted on eBay  
   
   in the 
 July 30, 2026
 
 
 Verified No, the item looks slightly different than in the photo. The bearing has too much play. The milled points are too sharp; I've rounded them off myself.
  
 
     Posted on eBay  
   
   e***g 
 July 26, 2026
 
 
 Verified ::: As expected, a beautiful piece!
  
 
     Posted on Trustindex  
   
   Andreas Nonnenmacher 
 July 24, 2026
 
 
 Trustindex verifies that the original source of the rating is Trustindex. +2
Great accessories Very high-quality accessories. Easy assembly. Very friendly contact via email and fast delivery.
  
 
     Posted on Trustindex  
   
   Günter Hoetling 
 July 21, 2026
 
 
 Trustindex verifies that the original source of the rating is Trustindex. Excellent service! Super fast response and very helpful! Communication was excellent, and I quickly received the information I needed. Highly recommended!