YetAnotherNewbieTubelessQuestion - which rim tape to get?

Tesa 4289 is what I use across several bikes. Never had a single failure so far.

How do you choose the width of tape to get? Is it just enough to cover the “well” at the middle of the rim? Does it matter if it goes over that?

It doesn't matter if it goes up into the bead bed in my experience.
I usually use about a 25mm but do two wraps staying more to one side then the other.

It's important to get tension in the tape as you do it. I tend to fit the wheel on the bike, clean thoroughly with IPA then you can hold the wheel with your knees as you lay the tape down getting it nice and taught and eliminating bubbles and creases.

Stickiness can be helped by warming the rim a bit with a hair dryer.

I've found the uberbike race tape to be much better than tesa tape. Tesas too rigid and not sticky enough.

The uberbike stuff comes off in one bit as well which is a bonus

I always go wider than the rim (e.g 28mm on a 25mm rim). This means that the tyre only has to seal against the tape itself, helping to avoid leaks.

I don't change tyres regularly though. Once fitted, they tend to stay on until worn.

My Fatbike rims were done with three runs of 50mm insulating tape.

Don't be tempted to use duct tape or cloth gorilla tape.... it works but removal is impossible it breaks up with the sealant.

Clear gorilla tape works well though.

Not particularly impressed with Peaty's. Spent the afternoon re-doing a rim as the first wrap failed as soon I inflated. Seems to have not stuck to the completely degreased rim

Internal width + 5 mm for me on width

I like proper rim tape, it usually seems not very stretchy or sticky but using heat and tension helps. I keep my wheel and tape in the house overnight beforehand and clean the rim bed thoroughly with alcohol. It's best to use tape a few mm wider than the inner rim width, this means the tyre forms a seal with the tape and is less likely to fail. One layer of tape should be fine. Extra care taken whilst applying it will mean it is less likely to fail and need replacing.

internal width plus a few mm. Leave the wheel in a warm place for a couple of hours. If you're starting from scratch the Joe's kit including valves was good value last time I looked, otherwise 50m of teesa is better value over the long term.

Muc off tape is my choice

Tesa. Fool proof and cheap. Fail to see why spending more is better. Enough stretch if you pull a bit . Price means that you can bung another layer on if you wish. I no longer even look to see if a rim is tubeless as they all work with an extra layer.

Thanks for all the tips - much appreciated!

Tesa. Fool proof and cheap

Move arrived today. It's really thick and doesnt conform to rim shape (Spank oohbah). Admittedly just testing in cold shed, but I didn't get on well with Stans either (looks the same stuff? Supported a bike shop buying it so wasn't cheap either.
Will probably look for something else, used lifeline tape before and that was thinner so much nicer/easier to work with.

Tesa 4288, has decent stretch and stick.
Any tape works much better with it and the rim warm.

Any tape works much better with it and the rim warm.

Just come to say - in case I put off people with my comment above - I was really doubtful warmth would make much difference, judging by the feel of it cold, but after leaving it on the radiator to warm up surprise surprise it made a big difference. Doh.

Ive been using this tape for a few years, had good results with it. I use the same width as the internal rim, make sure you stretch it tight when applying

FRIFLY Bike Wheel Rim Tapes 16-37 mm x 10 m, Tubeless Vacuum Tire Pad for Road Bike MTB https://amzn.eu/d/4mb3D7Q

@tomnavman I'm liking the numerous widths as all my bikes have different width rims