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Clydesdales/Athenas (200+ lb / 91+ kg) Looking to lose that spare tire? Ideal weight 200+? Frustrated being a large cyclist in a sport geared for the ultra-light? Learn about the bikes and parts that can take the abuse of a heavier cyclist, how to keep your body going while losing the weight, and get support from others who've been successful.

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Old 06-02-08, 05:53 PM   #1
WhaleOil
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Won't Hold Air

I put a set of 25's on the FX but every darn morning the rear tire is flat. Front's ok. I took the tire and tube out 2X and still the same crap. I dropped it off this a.m. and told them to check the dish, true them and essentially rebuild them. Makes me mad.

Anyhow, on a better note, going for a twilight ride on the 4300.......
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Old 06-02-08, 06:23 PM   #2
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Did you check the tube for a leak? Some tubes get damaged while putting air in them. I use the little nut to eliminate the play while jamming the pump head on. It damges the tube near the valve stem. And you must fine the debris causing the flat or you're in for more of the same.

I sometimes have trouble locating the hole so I submerge the tube in water, the only way sometimes if it's a slow leak. A patch kit is $4. Patch the tube for about a buck. Take it to the shop, is gonna cost you $20!
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Old 06-02-08, 07:11 PM   #3
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Just back from an attitude improvement ride

I did not check the tube for a leak with water. I should have. When I put the same tube (company) it had a leak at the stem. Put a new one in and it's fine.

The little nut. I asked about that at the local place. I had mentioned that that nut always backs off during a ride. He said on a flat rim, they at least turn down flat but on the rims I have with the 7.5FX you may as well throw them away. I did.

I have a patch kit and know how to use it.

Thankx Beanz!
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Old 06-03-08, 01:13 AM   #4
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I had a slow leak on a tube once and I could never find the leak, not even under water. I ended up buying a new tube, which isn't too expensive.
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Old 06-03-08, 03:15 AM   #5
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I had a slow leak on a tube once and I could never find the leak, not even under water. I ended up buying a new tube, which isn't too expensive.
Had the same happen to me many years ago. Spent a lot of time looking for a leak but couldn't find it, replaced the tube with one from the store... only to have that one leak right at the base of the valve stem, talk about bad luck (and a bit of bad positioning on my part ! Another tube and no problems after that.
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Old 06-03-08, 07:44 AM   #6
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Originally Posted by WhaleOil View Post
Just back from an attitude improvement ride

I did not check the tube for a leak with water. I should have. When I put the same tube (company) it had a leak at the stem. Put a new one in and it's fine.

The little nut. I asked about that at the local place. I had mentioned that that nut always backs off during a ride. He said on a flat rim, they at least turn down flat but on the rims I have with the 7.5FX you may as well throw them away. I did.

I have a patch kit and know how to use it.

Thankx Beanz!

Don't throw that little nut away!..................That's more than likely how you created that leak at the stem. By pushing down on the pump head you are flexing the stem into the tube. If you use the nut, it will eliminate that and lower the risk of damaging the tube at the stem. Speaking form experience here. I place the nut on everytime I inflate the tire. Not too tight, just enough to hold it secure.

I DO NOT RIDE with the nut on my rim. I carry it with me in my saddle bag. While making a roadside repair, it helps bigtime. I've seen several riders damage the stem during a roadside repair. They bend it, flex it, snap the stem, tear the tube etc. Plus it helps the pump head make better contact. Ever place the pump on the stem and it doesn't seem to accept the air? That's why. Secure the stem, then you are able to place pressure on teh stem without damaging it.

Couple of weeks ago we did a group ride. Some guy flatted and only had CO2. I let him use my frame pump rather than waste his air. He pumped and pumped for 3 or 4 minutes. saie it wan't working. WTF! I thought it was myu pump so I took over. He had about 3 lbs of pressure in it. I put the nut on and had it up within a minute or two. It's all about tips and technique!.....and he was an experienced veteran double century rider!

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Old 06-03-08, 09:54 AM   #7
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Also, changing a flat while a group of people watch and wait on you is very un-nerving.
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Old 06-03-08, 10:17 AM   #8
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Is that what that little nut is for? I assumed it was for weird rims or something like that. Learn something new every day...
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Old 06-03-08, 11:54 AM   #9
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Also, changing a flat while a group of people watch and wait on you is very un-nerving.
Hehehe! That's right! Once a dude from another forum came out ot do a century with us. He drove over 2 hours. He had a flat on his fairly new pride and joy $3,000 Specialized CF bike. He was an experienced rider wiht a few double centuries under his belt.

He flatted 15 miles into the ride. He tried to repair it but failed after 2 attempts. I offered my frame pump to locat the hole what have you. He denied cause he was so proud of his CO2. Didn't use the nut and wasted 2 canisters. 5 of us watching while he worked. He ruined on the stick on patch twice!

He got so upset he almost threw his bike across the small park we were at. He started swearing and said he was going to callhis wife to pick him up! 2.5 more hours of driving? I took the wheel form him and did it for him within a couple of minutes (also using the nut).

I offered help but he wouldn't take it. I finally had to nearly strip it from him! Yup, I think the pressure go to him!
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Old 06-03-08, 11:58 AM   #10
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Is that what that little nut is for? I assumed it was for weird rims or something like that. Learn something new every day...
I don't ride with it on the stem. I worry that it will tighten up while pulling on the stem causing damage. But I carry it for repairs.

Crazy that some argue about the rotaional weight while riding. Some won't even replace the small plastic valve cover cause they are concerned about extra weight ( I do to protect the stem from getting debris on my pump o-rings). Those stuid things are so small I could carry them between my cheek and gums if I had too!
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