mrrabbit 

XR-300 are lightweight aero racing clinchers...just like an Open Pro is a lightweight racing clincher. Strong is not their strong point.

Want a 30mm deep aero rim that is "reasonably" light AND strong?

- Velocity DeepV
- KinLin MX2G

Use double butted 2.0/1.8/2.0 or straight 14g stainless steel spokes (DT, Wheelsmith, Sapim, CNSpoke, Phil) with brass nipples.

For the Velocity DeepV - use 14mm brass nipples and an ERD of 581mm. (Keeps spoke a tad shorter for 14mm nipples...)
For the KinLin MX2g use 12mm brass nipples and an ERD of 582mm.

If you really want to go light - then go with the Mavic CXP-33 - at least it has internal ferrules for a little reinforcement. It is however a light weight racing aero clincher - but I much prefer it over an Open Pro.

The Novatec hubs - a.k.a., Dimension, a.k.a. Raleigh, a.k.a., Formula, a.k.a., Godspeed, a.k.a., All-City, a.k.a., SOMA, a.k.a., whatever the latest label is being put on the same track hubs - are absolute utter crap. Bad and inconsistent machining, strip happy cog threading, cheap bearings, and hollow low grade material excessively drilled axles that with one lb. too much torque on the mounting bolt results in a snapped axle at the locknut.

If you are on a budget - Origin8 or the Weinmann version. Stay away from the BTI distributed Quando made DQ9F / DQ9R unless you like play in modern cartridge bearings.

If you can afford a little more hub (15.00-20.00 per hub) money - take a look at Halo (Chosen) hubs with nickel-chromo axles with reinforced shoulders, Japanese bearings with retainer clips, machined alloy end caps, and traditional steel track serrated mounting nuts.


=8-)