Sun Ringle Duroc 35 wheelset review

A balanced wheel that's a cinch to tune

BikeRadar score4/5
  • Weight: 880g + 980g = 1860g (650b)
  • Width: 31mm/34mm
  • Freehub lag: 10°
  • Sizes: 27.5, 29in

The 35s are the mid-width wheels in Sun Ringlé's Düroc quartet but they’re still broad enough to sync well with the latest wide trail tyres. Add a well-balanced, encouraging ride with a reasonable weight for width, easy inflation, excellent tyre security and a massively comprehensive spares package included as standard and they’re definitely worth a look.

They might be called the Düroc 35 but my calipers clocked the internal width at 31mm. They still give plenty of support and a well-shaped carcass with 2.35–2.6-inch tyres that blow up to a 60mm external width.

The extra ‘lock’ effect of the humped rim bed means you can run narrower 2.8–3.0in tyres without any worry of burping or rolling the tyre at lower pressures.

The STR rims come taped as standard with Sun Ringlé supply valves and two small bottles of sealant in the box, so you’re ready to go tubeless straight away.

The domed STR profile also makes them easy to get an initial seal and expand that into a full fit even with an average track pump and a bit of determination. Don’t be alarmed by the loud pop as they bridge over the bulge and snap securely into place though.

The rim design and Wheelsmith double-butted spokes give a good balance of float, precision and power delivery for all-round riding. There were no denting issues even on rocky terrain at low pressures and there was no need to touch the spoke tension either. If you do, brass rather than alloy nipples stay smooth for easy adjustment.

My year-old set of 40s is ready for new bearings now and the freehub is a bit scarred, but otherwise they’re still enjoyably lively daily drivers. Long-term multi-bike versatility is also boosted by the inclusion of a full set of axle adaptors and an XD freehub body.

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

Guy Kesteven

Freelance Writer, UK
Guy started filling his brain with cycle stats and steaming up bike shop windows back in 1980. He worked the other side of those windows from '89 while getting a degree in “describing broken things covered in mud" (archaeology). Dug historical holes in the ground through the early '90s, then became a pro bike tester in '97. Guy has ridden thousands of bikes and even more components the world over since then and can remember them all in vivid, haunting detail. Can't remember where the car keys are, though.
  • Age: 45
  • Height: 180cm / 5' 11"
  • Weight: 68kg / 150lb
  • Waist: 76cm / 30in
  • Chest: 91cm / 36in
  • Discipline: Strict sadomasochist
  • Preferred Terrain: Technical off-piste singletrack and twisted back roads. Up, down, along — so long as it's faster than the last time he did it he's happy.
  • Current Bikes: An ever changing herd of test machines from Tri bikes to fat bikes and everything in between.
  • Dream Bike: His Nicolai Helius AM custom tandem
  • Beer of Choice: Theakston's Old Peculier (not Peculiar)
  • Location: Yorkshire, UK

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