M & H Slick Question????

[Shubee2 (DSK)]

I had a Pair Of NEW M & H Slicks Mounted on New Flat 4 Wheels. The Slicks Say Tubeless on the Sides and thats how they were Mounted, now here is the Problem they have been sitting in the Garage for three weeks and are both Flat they have not even been mounted on the Car?   I thought it might be the Flat 4 valve stems but I had street tires on the wheels before the slicks with no air loss??  anyone else had this Problem?  do I need to Run Tubes even if the Slicks say Tubeless???  Slicks are new and still have the Stickers on them....  Thanks in advance for any Help Gary

[The Ideaman]

My M&H DOT's did the same thing when tubeless.  One had a slow leak and went flat every other week, and one stayed pumped up.

[Ragtop]

That is normal. Mine do that too.

[Fastbrit]

They tend to leak air through the thin sidewall. It's rare for slicks to stay air tight for very long without tubes.

[Shubee2 (DSK)]

Thanks for the Info Guys     Are there Special Tubes?? or just use a 165X15 Tube?

[Airspeed]

Why not just pump them on the day you're gonna use them? Not having inner tubes has (weight) advantages 

[TexasTom]

Have you contacted M&H to ask if they can supply the tubes?
The tubes actually add an extra bit of support to the sidewall and tire as a whole, in my opinion. Without them, street-driving is interesting, especially around corners. But, they LOOK cool.
Slicks for regular use can pose problems. I kept mine off the car for the track only.
As you mentioned, the air pressure loss is a problem. Obviously, you'll need to keep the rear of the car on jack stands, or dedicate yourself to filling the religiously. You might consider checking them for leaks in a tub of water. I had a pair mounted tubeless once ... they wouldn't seat on the rim so I used silicone as a 'lubricant' ... may have helped the seal as they almost never needed refilling when stored/garaged.
If you do get tubes, you'll have to drill out the valve stem hole to fit the stem. Now they're dedicated slick rims ... or at least, potentially tube dependent or PTD.

[kingsburgphil]

The last time I bought new M&H's, I used tubes designed for bias ply tires. The pair I have on my car now are tubeless, and bleed air very slowly (if at all).
And if I have a leaking wheel/tire I use the old fashioned horse trough method of leak detection.  Hope that helps