jollyroger88 wrote:
Keep your present bike. Wait for some NOS 571mm GP4000's to pop up on ebay and slam them on the Zipp's, then save them for race day; you might also consider a disc cover (EZ Gains is quite good) on the rear. Pick a used 650c wheelset (they also pop up on ebay from time to time) and fit it with cheap tires for training rides. If you are training often on a direct drive trainer, tires will last for years. Good luckThese tires for training:
https://www.bike24.com/p2195115.html
These tires for racing:
https://www.bike24.com/p2361383.html
I buy from this store in Germany very often.
Delivery to the US is about 10 business days and it's 20 euros shipping total even if you buy several tires (I normally but 8 at a time) with no VAT tax.
The 162.5mm crank is fine, you don't need to go out and find something smaller. If you're buying a new bike then sure, try out something smaller but unless you are super low you won't need it.