not sure any clamp exists except heavy Park tools

in race...her foot to break bead and/or one of these to wail on it

Speedier Tire Lever

Single lever removes/installs tires and protects knuckles from injury.

www.crankbrothers.com

this guy shows how to use it

 

Find something to brace the wheel on (trash can is ideal, but you could use anything to keep the rim suspended, with the tire overhanging). Grabbing the sidewalls at 180 degrees apart, roll your palms along until you are pressing right along the top of the bead. With a short, violent motion, push down/repeat (think: movie trope of grabbing someone by the shoulders and shaking them back to 'normal').

With a few heaves, the more stubborn tires will give. Most normal tires can be done by applying the same palm motion, but grabbing the tire/flexing sideways, not attempting to pull it directly off. For the most stubborn tires, though, the first method rarely fails.

 

OP- does she ride with a tubeless plug kit?
That will fix the majority of punctures without having to break the bead.
An effective way to break a stubborn bead roadside/trailside is to remove the wheel from the bike and place it on the ground and then stand on opposite sides of the tire/wheel at the tire/rim junction.

 

OP- does she ride with a tubeless plug kit?
That will fix the majority of punctures without having to break the bead.

This. I've plugged a 1/2" hole with my Dynaplug and was able to finish the last 30 miles of my ride.

 

So like a foot?

 

Lol... that's what I told her. She doesn't want to scratch her nice carbon wheels, but honestly... this might be the answer... I could make her a little block to place up against the rim and step on. A jacket on the other side to protect the rim should work.

 

Member has removed content due to fundamental disagreement with this site owner's views favoring expanded access for electric mountain bikes (eMtb) on multiuse singletrack in public lands.

 

^^^^^
Necessity is the mother of invention

 

My wife just got a new road bike and for the life of me I couldn't brake the bead on the tires. I have never had that happen before, and I have changed thousands and thousands of tires. Ended up having to use a bench vice.

Anyways, there was no way I was going to let her go out on wheels she couldn't change a flat on. I changed the rim-tape on the wheels from the stock to some Stans. The stans tape is thinner making it quite easy to break the bead. Wouldn't hurt to give it a try on your wife's bike.

 

@Sparticus the bottles are "Yorker" brand. You should be able to find whatever you want that way.

 

Thanks for the tip.
I googled ’Yorker brand bottle’ sure enough, the Yorker bottles look very similar to the 2 oz bottle that Stans sells.
Although the Stans bottle is white while the Yorker bottles are translucent.
I’ve found the Stans bottles to be very durable — to the point of being abusable in a rough & tumble mountain bike backpack that get thrown into the back of my vehicle, on the ground, etc.
Don’t know about the Yorker brand bottles as I’ve not used them.
Also I didn’t find any flat caps (allowing reseal) for the Yorker bottles.
Not saying the Yorker bottles aren’t as good as genuine Stans, just saying I don’t know.
Do you use the Yorker bottles?
=sParty

 

Soooo... problem solved. For this tire/wheel/tape combo at least. And it turned into a root problem identification issue rather than a brute force solution. I thought that I had used Gorilla tape on these wheels. Not true it turns out. What I had done, to get the older set of Rene Herse tires to seat, was put a double layer of the tape that Light Bicycle ships with their wide MTB wheels. It's great tape. I use it on all my wheels. But in this case it covers the rim from bead to bead. Great for getting tires to seat. Not great for trying to get the beads to unseat by hand. Add to that a tire that has just a slightly smaller bead diameter than say a GravelKing SS.... in this case a Vittoria Torenno Dry.... and a little bit of dried sealant, and they were nearly impossible to get back off the rim.

Retaped with a double layer of the narrower tape that sits down in between the beads and.... voila. She can now easily unseat the tire by hand.

Thanks to all the suggestions here. Especially those pointing me in the direction of rim tape, as I'm not sure I would have gotten there alone.