365g each at $239

https://www.ebay.com/itm/LAST-STOCK-27mm-Wide-Carbon-27-5-MTB-Clincher-Mountain-Bike-Rim-Tubeless-1PAIR-/274923694648?mkcid=16&mkevt=1&_trksid=p2349624.m46890.l49286&mkrid=711-127632-2357-0


275g each at $339

https://www.ebay.com/itm/LAST-STOCK-ULTRALIGHT-27mm-Width-27-5-Carbon-Fiber-Mountain-Bike-Rims-1PAIR-/274923674426?mkcid=16&mkevt=1&_trksid=p2349624.m46890.l49286&mkrid=711-127632-2357-0

I’ve had good luck with these. Good enough luck that I’ve bought a few for my kids and a few for the techs at work to use as flashlights.

Compact Bike Light USB Rechargeable 800 Lumen LED Commuter Headlight Tail Light Set https://www.amazon.com/dp/B01JH626M2/ref=cm_sw_r_cp_api_glt_fabc_EV7XVVCR1HRN3XHSXN2X?_encoding=UTF8&psc=1

I’ve had XMCarbon rims from Peter, Nextie, and Hulk bike rims. All have been great. For your weight, just stick with an AM weight and you’ll be fine. Something 450g or up.

Here’s a deal on some Nextie rims if you are okay with 29mm inner width. 28h will be fine if built properly. I’m 185 pounds riding weight and run 400g 32mm inner width rims from XMCarbonspeed. 28h with CX-Ray spokes. Total weight is 1475g and they’ve taken a beating.
https://www.ebay.com/itm/SALE-36mm-Width-Carbon-Fiber-29-Mountain-Clincher-Rim-Tubeless-1PAIR-/274838754813?mkcid=16&mkevt=1&_trksid=p2349624.m46890.l49286&mkrid=711-127632-2357-0

I hope it's indestructible! I don't think the ferry terminal workers are going to be too easy on it. There's a bunch of islands off of the coast of Maine that only have ferry access, and some don't allow cars. The plan is to ride as many as possible. I was using my wife's Domane 6 as a weight benchmark and I didn't even come close. That is 16.8 pounds but it's running 28mm slicks so it's not really an apples to apples comparison.

The spokes are actually white, which in person, pops really good with the pink nipples, 3k rims, and 350 hubs. I got rather lucky with the pink all being really close. The bolts and spacers are from one company from eBay, the valve stems are Industry Nine, the headset is a limited edition Cane Creek Slamset from a couple years ago, and the nipples are cnSPOKE from Amazon. The pedals are red as that was all that was available from Xpedo when I ordered them.

Bead blasting is finished and came out better than I had hoped. I started the build and should have that wrapped up today or tomorrow. Looking like the final weight will be in the 19.5 pound range. The heavier Ti frame and dropper post add about 3 pounds over carbon and fixed post.

Not sure yet, it's still in shipment. I'll update the thread as the build progresses.

Hubs: The DT 350 hubs are hard to beat but go with the centerlock version. You'll save a bunch of weight there. You are a bit limited in rotor selection, and you can't get the super light Ashima rotors in centerlock. But an XT centerlock will be lighter than an XT 6 bolt.

Spokes: I've had great luck with DT Aerolite spokes but they aren't cheap. My last set I had built with white ones as I found this deal on them. $2.50 per spoke isn't cheap either but still better than $3.50 and up.
https://www.ebay.com/itm/254861762302?ssPageName=STRK%3AMEBIDX%3AIT&var=554702691077&_trksid=p2060353.m1438.l2649

Also, these CX-Rays are a decent price.
https://www.ebay.com/itm/362633234947?ssPageName=STRK%3AMEBIDX%3AIT&var=631774260436&_trksid=p2060353.m1438.l2649

Nipples: If you go aluminum, DT Swiss and Sapim. Otherwise, go brass. I've read that Sapim and DT have a better anodizing process. My winter bike has CX-Ray spokes, carbon rims, and alloy nipples. It's had a few rides on the back of my car with slushy roads. They are still going strong after 5 or 6 years. There's a couple that have gotten a bit white but nothing concerning. I'll probably pull the rim tape off this fall to reassess.