Their website says that Andra 30 rims will take 28 - 62mm tyres. 

That advice is overly conservative. I rode 2,000 kilometers with 2.6" Schwalbe Pick-Up tires on my Andra 30 rims. I had no difficulty mounting the tires, and no problems on the ride (which was on very rough offroad terrain where I was using a range of tire pressures). I subsequently had new wheels built with Ryde Rival 30 rims in order to gain tubeless compatibility, and again I have 2.6" tires on those. So, I don’t think 40 rims are necessary for most of the use cases described on this forum.

As a postive data point, I am running Andra 40s on my tandem and have been very pleased with them. I have 26x2.0 Schwalbe Duremes mounted on them.

My Nomad Mk2 and my Enduro-Allroad bike use the same brand/model/size tires, mounted on Andra 30s. I have also been very pleased with them.

I just dashed out to my garage and did a comparison measure across the tire sidewalls, inflated to the same pressure. There is exactly 5mm difference at the widest part of the tire sidewalls between the Andra 30 and 40 (the 40 has the larger/wider measurement)...within 1mm of the published difference between internal rim widths.

Put another way, that 5mm is a difference of 2.5mm or 3/32in per side. On the one hand, not much on a tire measuring "about" 50mm, on the other, a 5mm/10% difference in overall width.

Any height difference I found much more difficult to measure in my quick effort as it was difficult to keep the bikes exactly vertical while I measured rim-to-ground with an offset caliper. As close as I could tell, there is somewhere between 3-4mm difference in height, the 40 being lower in profile and more rounded, as you might expect from a typical 1:1 aspect ratio (same bead-to-bead width but stretched wider means not as tall from the rim bead seat to contact point with a static load of just the unladen bicycle). I'd urge caution with the numbers here, as this was a quick measure on my part rather than to my usual gnat's eyelash standards for accuracy. If you're fussy and have changed rims, you might want to do an actual rollout under load to get the most accurate figures to plug into your cycle computer.
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If I have got the right comparison on the SJS Cycles site, their published weights for the 559 x 32 hole Andra 30 is 735g the Andra 40 is 750g, only a 15g difference. If weight is a critical concern you'd best check the figures yourself, as I had to take a call midway in my comparo and was a little distracted.

Best, Dan.

If you like the Andra 30, but want something wider, why not the Andra 40? Andra 30 is 19mm, Andra 40 is 25mm.

Quote from: Andre Jute on May 18, 2026, 07:59:59 PM

* As far as I know, the special Rohloff version Sapim Strong spokes are different mainly or even solely in the angle at the hub end to preserve the flange. Correction welcome if you know better.

Yes, the difference is just the J bend.  But, Rohloff spokes are a version of Sapim Race, a double butted 2.0/1.8/2.0 spoke.  Not the single butted 2.3/2.0 Sapim Strong.

You're right, of course. But Utopia-velo was the first OEM to specify Rohloff gearboxes, and they never flinched from getting designs of their own or custom adaptations of existing designs specially and expensively made for their bikes. (They weren't nicknamed "the Rolls-Royce of bicycles" for being cheap.) So for their heaviest touring bike, the Kranich, and the Rohloff, they had these special Sapim Strong made, perhaps because the special Sapim Race for Rohloff hadn't yet been born. The photo is of a couple of the spare spokes that came in a substantial "welcome box" of spares, tools, etc with my bike. Thanks for your help.

* As far as I know, the special Rohloff version Sapim Strong spokes are different mainly or even solely in the angle at the hub end to preserve the flange. Correction welcome if you know better.

Yes, the difference is just the J bend.  But, Rohloff spokes are a version of Sapim Race, a double butted 2.0/1.8/2.0 spoke.  Not the single butted 2.3/2.0 Sapim Strong.