Ask the experts

[skinipenem]

After a battle, I successfully mounted a dh cased kryptotal front with cushcore. Now I have a leak through a hole in the rim (see picture. ) The hole is intentionally manufactured and not the culprit. What is that hole, just curious?

Rim tape problem??? Or not enough sealant (I poured at least a couple cups in. )

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[rudy]

I like the PNW loam pedals. Can’t relate to size 13 tho

[rideit]

Rim tape.

[skinipenem]

Broke a plastic flat pedal in half today, maybe I should go aluminum. Go to not stupid price pedals for big (size 13) feet?

You could try the pedaling innovations catalyst pedals. I have a pair i can sell you. I used them once for a brief ride. I didn't like the foot position for jumping; however, the pedals are great for pedaling. I have average size feet though.. size 9.5 eeee. I wear 10 or 10.5 street shoes. Mondo 25.5.

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[toast2266]

After a battle, I successfully mounted a dh cased kryptotal front with cushcore. Now I have a leak through a hole in the rim (see picture. ) The hole is intentionally manufactured and not the culprit. What is that hole, just curious?

Rim tape problem??? Or not enough sealant (I poured at least a couple cups in. )

Sent from my SM-S908U1 using Tapatalk

Rim tape.

Holes like that are usually to let air escape the inner part of the rim during manufacturing.

[skinipenem]

Rim tape.

Damnit. That's what I thought. Well... here goes taking the tire and insert of and going at it again. Frickin thing was fine with the same insert and the last tire. Oh well.

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[SchralphMacchio]

Years ago I started putting a sacrificial layer of Kapton tape over the actual sealing layer of Stans tape, so that any fuckery requiring tire levers or extreme manhandling would not lead to leaking air. So far so good, the sealant has tunneled through the Kapton in a couple of places but I’m way more tire changes deep on this tape setup than I ever was on just Stan’s.

[Dromond]

Years ago I started putting a sacrificial layer of Kapton tape over the actual sealing layer of Stans tape, so that any fuckery requiring tire levers or extreme manhandling would not lead to leaking air. So far so good, the sealant has tunneled through the Kapton in a couple of places but I’m way more tire changes deep on this tape setup than I ever was on just Stan’s.

Is that tape something you had laying around or did you use it for a specific reason? I’d never heard of it before.

[SchralphMacchio]

I bought it specifically to use as a rim sealing tape but realized it would not work as well as Stans (it’s harder to apply since it is harder to stretch and avoid wrinkles), so then I decided to double up since it’s so thin that the extra weight of the Kapton isn’t really noticeable. Kapton is a specialty tape that I learned about when I was in the electronics industry.

[XXX-er]

Broke a plastic flat pedal in half today, maybe I should go aluminum. Go to not stupid price pedals for big (size 13) feet?

which brand I've had chesters and they seem fine, I bought an expensive bike and they offered to thro in some raceface chesters so I said plastic really ?

Bro said i've sold 150 pair of those and they don't come back and they don't stick on rocks

[Roxtar]

I'd say they run true to size for a Maxxis (meaning that a 2.3 aggressor is comparable to a 2.3 DHR2). Last time I measured one (which was a while ago), a 2.3 Aggressor measured about 56-57mm at the widest points of the knobs. Casing was a bit smaller than that.

I think with a 2.6 hellkat up front, you'd probably want the 2.5 aggressor unless you were looking for a substantially smaller rear tire.

Yup, went with 2.5 and it's dwarfed by the Hellkat.

[Dee Hubbs]

How does one post photos now?
Bonus, who ever helps me gets first pick in the the Dee Hubbs Greatest Bike Parts Sell Off.
I really need to list some stuff for sale....

[Andeh]

How does one post photos now?
Bonus, who ever helps me gets first pick in the the Dee Hubbs Greatest Bike Parts Sell Off.
I really need to list some stuff for sale....

I just threw photos in a Google Photos album and did a link.

[John_B]

How does one post photos now?
Bonus, who ever helps me gets first pick in the the Dee Hubbs Greatest Bike Parts Sell Off.
I really need to list some stuff for sale....

Tapatalk has been working for me. Here is a random photo of a bolt as proof.

[grrrmountainman]

I downloaded the Tapatalk app and seems to work on there without any linking and other tech stuff I’m totally incapable of

[El Chupacabra]

Tapatalk has been working for me. Here is a random photo of a bolt as proof.

Same here. Here's a random photo of a shovel. Uploaded as normal on Tapatalk.

[toast2266]

Same here. Here is a screen shot of a photo of El chup's shovel. Uploaded via tapatalk.

[El Chupacabra]

Meta post is meta.

[basinbeater]

Worked for me too! Sweet!

Sent from my Pixel 6 Pro using Tapatalk

[Dee Hubbs]

What about desktop? Using Safari?

[priapism]

Any idea where I can get my hands on a Sram HRD piston rebuild kit? PN/11.7018.075.001. Out of stock in north america, seems to be available in yurp but they don't ship to US

[Dumbest Known Time]

Post a picture from desktop and use the first draft pick in Dee's alleged parts sell off?

[toast2266]

What about desktop? Using Safari?

Pretty easy actually. Just pull the picture up on the desktop, use your phone to take a picture of your screen, and post it with Tapatalk.

[radam]

I'm in tubeless hell. Swapped a tire on a gravel wheel (Easton AX70, pretty sure its the same as a non-offset AR24 or ARC24 rim, welded seam). Previously was holding air just fine. Seemed fine at first, held pretty well for a day or two, but seemed a little low, so added a bit of sealant before a ride. Slow leak during a gravel ride, got down to ~15 psi, decided to see if topping it off with the hand pump would be sufficient, I think maybe the valve core or stem was a little clogged up because it was leaking more air than was going in as I was pumping and it wasn't working. Hit it with CO2, that also didn't really work, ended up spewing sealant out the valve stem base. Gave up and threw a tube in. When home, pulled tire, inspected the tape. It was lifted ever so slightly in a spot or two, there was some sealant under the tape in the rim channel in spots, but edges seemed to be adhered pretty well. Tried to just clean it all up and throw a fresh layer of tape over it (I'm using kapton/powdercoating tape, even used it just fine on the other AX70 wheel no problem). Aired up, bead seated, all good... holding air at ~40 psi just great, but then come out the next day and shit's flat again. Re-air, check with soapy water... some very very faint leaks at the bead in a spot or two (the kind you need to put your lip up to to feel, or that are only visible with extremely soapy water). Add some sealant, hope for the best.. no go. Air it up again, re-check with soapy water plus a dunk in a tub of water... air's coming out the rim vent/drain hole. Not a ton, but obviously enough that it goes flat after ~8 hrs. Pull tape, clean, dry, re-tape.. same deal. Try again, with a double layer. Nope. Repeat. Same problem. Try it all again, this time attempting the tube at max pressure overnight to help seat the tape. Nope, still leaking at the vent hole. Maybe even getting worse? Try it all again, this time with a little plumbers tape on the valve stem base to see maybe that'll do anything... nnnnnope. Ok. Try again. Clean, re-tape, this time with a small bit of gorilla tape covering the valve hole and adjacent spoke holes, just thinking maybe that since it conforms a little better and is more durable than the kapton tape, this'll do it. Nope. somehow it's even worse than before. Having a lot of trouble getting the bead to go even with things soaped up and when I do get it to go, now it's leaking at the vent hole so fast the time goes flat in a minute instead of hours.

I know a different tape is an option (don't have any on hand, but obviously can get some). But what the fuck am I doing wrong??? This is not my first tubeless rodeo. I've converted arguably non-tubeless rims and tires in the past (albeit with a similar amount of cursing), but I feel like this should not be some frickin hard. And I "know" that if the air comes out anywhere other than the tire that it's a tape issue 99% of the time, but I'm starting with a clean, residue free rim bed each time and getting what looks like great wall to wall adhesion, so is there anything I'm missing? Some random trick that's so obvious I'll put my fist through a wall afterwards?

[toast2266]

^^^ try a different valve.

Some valves just don't play nice with some rims. And the gaskets on the valves sometimes get shitty over time and don't form a good seal with the rim.