SunRingle has released a new SR32 range of mountain bike wheels that come in a comprehensive range of sizes. We aren't talking radical niche 36er or 750d wheel sizes, instead alongside the expected 29er and 27.5 options are three youth sizes.
We are beginning to see an increased focus from bike brands to produce performance youth bikes that roll on smaller, size-appropriate wheels. SunRingle are offering the same performance across all SR32 wheel sizes from 20in to 29in.
The shallow 20.25mm deep 6069 aluminum rims have a very wide 32mm inner rim diameter which SunRingle has been specced to give better tire stability. 32mm is on the wider side for a trail wheel and, as far as we are aware, the only 32mm wide rim that comes in a 24in or 20in wheel size.
The 29 and 27.5 rims are welded while the three youth-sized wheels have a sleeved joint. As you would expect the rims are tubeless-ready and all use 28 spokes.
The wheels have slightly differing builds between the adult and youth wheels. All the youth wheelsets are built with brass nipples and J-bend spokes. They use Ringle hubs which come in 100/135xQR, 100x15/142x12, or 110x15/148x12 boost spacing with freehub compatibility for XD and MicroSpline. Weights for the complete wheelsets are quoted at 1685g, 1857g, and 1947g for the 20in, 24in, and 26in respectively.
The full-size wheels come in two spec levels, SR32 Trail Expert and SR32 Trail Pro. Both the wheelsets come in six bolt rotor format only and with HG, MicroSpline, or XD freehub options. Where they differ is the hubs. The Expert wheelset uses Ringle's SRX hub, while the Pro version has their Super Bubba X hub which has four degrees of engagement for a rapid pick up when you turn the cranks. The Pro wheels have alloy nipples rather than brass nipples too.
Weights for the wheelsets are claimed to be 1,840g for the Pro and 1,814g for the Expert. SunRingle doesn't specify which wheel size they weighed in the press release but based on the youth wheel weights, we suspect the weight is for a 27.5 wheelset.
There is no stated availability date for the 29 and 27.5 wheelsets, while all the sizes of youth wheels are pegged to be available late 2023.