What is the best way to remove last years glue from my tubular rims ?
(Solvent?).
Acetone works good, or a product called Goof Off.
I use goof-off and let it sit for a few hours then add some more.
I then use the tip of a spoon and remove the bulk of the glue - I never get down to a clean rim. Too much effort required.
Just change tubies two weeks ago. Striped all the old glue off with 3m general purpose adhesive cleaner available at any body shop supply store. Take aii the glue off! You will have much better results
If they are metal rims a heat gun/hair drier softens thick glue up so it can be wiped off leaving just a thin layer easily removed with chemicals or as a base for the next glue job. I don’t know if that level of heat would be good for carbon rims.
I’ve had lots of problems removing old glue from carbon rims (Vittoria Mastik 1) and ended up with a reasonable solution by fixing a little scraper to a soldering iron and using the hot scraper to melt and remove most of the glue. It leaves a nice thin smooth layer of glue as a base for a new coat and is not too messy and quite a quick process. I used an old hacksaw blade tip as my scraper and ground it to fit the rim well and also to remove the sharp corners. I used the hacksaw blade as it was a thin piece of steel with a hole already through it to make mounting it to the soldering iron easier. Used a normal gun type soldering iron with the looped tip and just screwed the modified blade to it and started scraping. Took around half an hour for each wheel.
Roller tests on the newly mounted Vittoria crono tubulars (generous coat of glue on rim and thin coat on the tub), gave crr results of around 0.0029.