Renthal Fatbar 35 and Apex 35 stem review£160.00

Renthal's Fatbar gets fatter and lighter

BikeRadar score4/5

Renthal was so happy with the balance and feel of its 31.8mm diameter bars that it was reluctant to adopt the new 35mm ‘standard’. So why the change? Well, our 40mm-rise Fatbar 35 weighs just 299g — that’s 66g lighter than the 31.8mm equivalent, despite it being 20mm wider at 800mm.

The wider the diameter of a tube, the greater its stiffness-to-weight ratio. Renthal has used this knowledge to make the 35mm Fatbar lighter, not stiffer — it didn’t want it to feel harsher than the 31.8mm version. Cut down to 780mm for comparison, we couldn’t feel any difference between the two, with the Fatbar 35 proving exceptionally comfy on long, rocky descents.

The bar’s aggressive angles (seven degrees of backsweep, five of upsweep) feel spot on to us, encouraging a more aggressive riding position than the eight to nine degrees of backsweep found on many bars.

Our 40mm Apex 35 stem is 1g heavier than its 31.8mm equivalent, at 118g. Both are among the lightest in class, but require careful fitting. Greasing the bolts before installation and torquing them up precisely when installing is essential.

  • Bar: £70 / US$85 / AU$130
  • Stem: £90 / US$110 / AU$160

This article was originally published in Mountain Biking UK magazine, available on Apple Newsstand and Zinio.

Seb Stott

Technical Writer, UK
Seb is a geeky technical writer for BikeRadar, as well as MBUK and What Mountain Bike magazines. Seb's background in experimental physics allows him to pick apart what's really going on with mountain bike components. Years of racing downhill, cross-country and enduro have honed a fast and aggressive riding style, so he can really put gear to the test on the trails, too.
  • Age: 24
  • Height: 192cm/6'3"
  • Weight: 85Kg/187 lbs
  • Waist: 86cm / 34in
  • Chest: 107cm / 44in
  • Discipline: Mountain
  • Preferred Terrain: Steep!
  • Current Bikes: Focus Sam 3.0, Kona Process 111, Specialized Enduro 29 Elite
  • Dream Bike: Mondraker Crafty with Boost 29" wheels, a 160mm fork and offset bushings for maximum slackness.
  • Beer of Choice: Buckfast ('Bucky' for short)
  • Location: Bristol, UK

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