If you lace 36 spokes you Open Pros you should have a really strong wheel. It's nice to have that confidence when riding in a city to pop curbs etc with no fear of things going out-of-true. It's your rear wheel that takes the battering.
That said my bikes have 32 spoke rear wheels... because I only weigh 60kg. I'd like a 28 spoke front wheel ideally.
Sano is right, your existing hub is going to dictate which rim you'll need. I think Charge use 36h (but do check!).
If you lace 36 spokes you Open Pros you should have a really strong wheel. It's nice to have that confidence when riding in a city to pop curbs etc with no fear of things going out-of-true. It's your rear wheel that takes the battering.
That said my bikes have 32 spoke rear wheels... because I only weigh 60kg. I'd like a 28 spoke front wheel ideally.
Sano is right, your existing hub is going to dictate which rim you'll need. I think Charge use 36h (but do check!).