I've been riding RH Barlow Pass EL and SOMA SV EX38 for a few years, and am now tempted to try either the Strada Bianca 36...or maybe better...the new Tufo Speedero. Does anyone know whether the Tufos run wider or narrower than spec? My 38s fit fine in on my first-gen Diverge's CLX carbon hoops. I'd be tempted to try the 40 ONLY if they run small. Obviously, if they run large, I'd go with the 36. None of the e-sellers can confirm anything yet. I'm 90% urban asphalt and 10% loose gravel. Don't want to compromise comfort or RR, but would like a less fragile sidewall...and glass shard resistance? (That's why I tried Schwalbe 38, but they're really 40's and kept rubbing.) Thanks folks. Ern
BRR says the 40 mm Tufo Thundero measured 37.6 mm on a 18 mm (inside) rim. That means it would take about a 24 mm rim to get it up to the marked 40 mm. They may also stretch a bit after some time or at higher pressures. According to Tufo the Thundero and Speedero weigh exactly the same so I assume they use the same carcass.
My 36 mm Strada Bianca Pro (tube type) measure 38 mm on 25 mm (inside) rims and haven't stretched. They should be true to size on about a 20 mm rim.
In my experience just about anything will give you much better glass shard resistance than a RH EL or Soma SV. I can't speak about the sidewalls because I've never had sidewall problems, even with those two.
If you don't need tread you might also consider the 35 mm Conti Grand Prix Urban.
