I ordered a set of Ambrosio Nemesis to handle dirt riding duty but the seller ended up cancelling since there was an issue with them. I've been wanting to try the Vlaanderens for awhile so I decided to glue them up to the Bora 50s.
Acid brushes and a can of Mastik:
Apply a light coat and then wait for 10-15 minutes for it to become tacky before mounting:
Don't be afraid to pull the tire up on spots to reseat it and get it straight. After all is done:
My initial riding impression of the Vlaanderens is that they do not gain any suppleness over the Roubaix, which probably means they are less supple than the Roubaix given I'm running them at 60/70 vs 70/80. Riding over bigger "crap" they seem to do with aplomb and I can get away with faster speeds cornering over broken surfaces. So, based on my brief ride I'd say get them if you have a use case for the extra width (e.g. dirt riding or cobbles) but for general road riding my recommendation would be the Roubaix.
Regarding the Bora 50s vs 35s:
I find them to be a hair stiffer laterally and I think vertically. It's just a very very slight difference. That's probably due to the 50s making use of a faring to get the extra depth so it's not structural like most other wheels. I'm preferential to the 35s but the 50s handle very well in cross winds, much better than the 404s (that's an understatement). I rode in a roughly 10mph cross wind the entire way home last week and didn't notice it once. I'm not sure how the other new generation wider rims corner, but these are night and day better than the older narrower Reynolds. I keep matching descending PRs without feeling like I'm trying. Brake track is much better IMO than Zipp and Reynolds. With the red pads they brake very very well and have no pulse. Overall though, I like the 50s and they'd be my recommendation over other offerings in a similar depth.
_________________StravaCurrent Stable. The Snob Machine
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LS Siena: 6.21kg | Parlee Z5 SLi: 5.9kg | LS Xicon: 5.76kg | C59: 5.7kg | Cervelo R5ca: 5.09kg | Fuji Altamira SE - 6.2kg | Scott Foil - 6.2kg | Evo - 5.18kg | LS Classic - 6.7kg