rideon
2nd January 2013, 22:18
Traveling to Ohakune last Sunday, to stay for 2 nights over new years, the ride ( 5 bikes in all ) was going really well - Hamilton-Mangakino-Benydale-Waimiha-Taumaranui-Ohakune. I had been leading most of the way until we hit SH 4 about 25 kms out of Taumaranui. I waved the everyone through & took on TEC duties.
As I was last out onto SH 4 & the next bike in front had a speed limiting device (detector) I wound it on just a lil bit to catch up and was enjoying quite a brisker pace compared to the ride so far.
I passed a cage towards the end of a small straight , pitched the bike into an unmarked RH bend. And thats when the shit hit the fan. The bike stood up instantly and wanted to go straight & my first thought was, #*ck , that was a big gust of wind.:shit: When the bike wouldn't lay over again I figured something else was wrong. :shit:Getting off the gas made it worse , and pushing on the Bars harder made the bike wobble.
Tyres was my next thought and I vivedly remember teIling myself - DON'T TOUCH THE BRAKES and look where I want to go !! I had to roll on a bit of gas to try and unload the front a bit , hang off the seat (which i don't normally do ) and managed to man-handle her round the corner and coast to a very wobbly shaky stop on the side of the road. All of the above happened VERY quickly , but also in slow motion - very weird ???
I hopped off & sure enough my front tyre was as flat as a pancake. I then realised I had just experianced an instant blow out , mid corner , at a briskiish pace & somehow was still upright and in one piece. I do carry a dog turd kit & thought it would be any easy fix but after checking the tyre twice, could not find the offending sharp bit or any wound. I wiggled the valve stem & heard a very liittle "ssssss" . mmmmm I thought, this won't be an easy fix !!
By this stage someone had come back looking for me. He had a tyre panda and as the 2 after hours numbers from the 2 bike shops in Taumaranui were diverting straight to answer phone , we decided it was worth a shot. We got some air into the tyre but most of the goo came straight out of the base of the valve stem, which is where it had failed. In this case - tyre panda, FAIL - too big a gash
I had some cable ties in my box of tricks & then figured I could pull the valve over onto its wound and hopefully it would hold enough air to at least get 19 Kms into town. I pulled the valve over onto its wound & secured the ties to a spoke , chucked in two canisters of CO2 & bingo I was mobile. Managed to cruise along at 60 - 70 Kms/hr and got into town.
Still no luck with 2 bike shops or 2 tyre shops so after 2 hours of trying to get it sorted we decided to jiggle to ties around a bit. I managed to get 30 psi in the tyre & holding air, gassed up & we headed off for Ohakune. The temporary fix worked a treat , cruised in the middle of the pack at about 90 - 100 clicks & got safely all the way to Ohakune, another 80 odd Kms , although the whole way it felt like I was riding a timebomb !!
Next morning - tyre off and into town where the tyre shop was able to install a new valve - $10 all sorted.
Thinking about the fail & I think it may be the cheap 90 deg screw on attachment, that under the centrifugal forces , may have stressed the valve over time, to the point where it failed big time. They are now off the bike & I will stick with the straight ones for the time being. For the record , thats the first flat tyre I had in about 150,000 Kms & hopefully the next is not as instant as this one was !! Me thinks a lotto ticket may be on the shopping list this week.........
As I was last out onto SH 4 & the next bike in front had a speed limiting device (detector) I wound it on just a lil bit to catch up and was enjoying quite a brisker pace compared to the ride so far.
I passed a cage towards the end of a small straight , pitched the bike into an unmarked RH bend. And thats when the shit hit the fan. The bike stood up instantly and wanted to go straight & my first thought was, #*ck , that was a big gust of wind.:shit: When the bike wouldn't lay over again I figured something else was wrong. :shit:Getting off the gas made it worse , and pushing on the Bars harder made the bike wobble.
Tyres was my next thought and I vivedly remember teIling myself - DON'T TOUCH THE BRAKES and look where I want to go !! I had to roll on a bit of gas to try and unload the front a bit , hang off the seat (which i don't normally do ) and managed to man-handle her round the corner and coast to a very wobbly shaky stop on the side of the road. All of the above happened VERY quickly , but also in slow motion - very weird ???
I hopped off & sure enough my front tyre was as flat as a pancake. I then realised I had just experianced an instant blow out , mid corner , at a briskiish pace & somehow was still upright and in one piece. I do carry a dog turd kit & thought it would be any easy fix but after checking the tyre twice, could not find the offending sharp bit or any wound. I wiggled the valve stem & heard a very liittle "ssssss" . mmmmm I thought, this won't be an easy fix !!
By this stage someone had come back looking for me. He had a tyre panda and as the 2 after hours numbers from the 2 bike shops in Taumaranui were diverting straight to answer phone , we decided it was worth a shot. We got some air into the tyre but most of the goo came straight out of the base of the valve stem, which is where it had failed. In this case - tyre panda, FAIL - too big a gash
I had some cable ties in my box of tricks & then figured I could pull the valve over onto its wound and hopefully it would hold enough air to at least get 19 Kms into town. I pulled the valve over onto its wound & secured the ties to a spoke , chucked in two canisters of CO2 & bingo I was mobile. Managed to cruise along at 60 - 70 Kms/hr and got into town.
Still no luck with 2 bike shops or 2 tyre shops so after 2 hours of trying to get it sorted we decided to jiggle to ties around a bit. I managed to get 30 psi in the tyre & holding air, gassed up & we headed off for Ohakune. The temporary fix worked a treat , cruised in the middle of the pack at about 90 - 100 clicks & got safely all the way to Ohakune, another 80 odd Kms , although the whole way it felt like I was riding a timebomb !!
Next morning - tyre off and into town where the tyre shop was able to install a new valve - $10 all sorted.
Thinking about the fail & I think it may be the cheap 90 deg screw on attachment, that under the centrifugal forces , may have stressed the valve over time, to the point where it failed big time. They are now off the bike & I will stick with the straight ones for the time being. For the record , thats the first flat tyre I had in about 150,000 Kms & hopefully the next is not as instant as this one was !! Me thinks a lotto ticket may be on the shopping list this week.........