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seedsbelize2 07-10-22 01:55 PM


Originally Posted by datlas (Post 22570004)
I see what was done there.

I don't get it.

genejockey 07-10-22 02:21 PM

I was feeling less than stellar on the bike, possibly still a little under the weather from the double vax, though my HR seemed pretty much what I'd expect. So I decided on a leisurely ride, to cap off what I had decided would be a recovery week. So, there I was, at about mile 31, just starting down a short drop that leads to a 180 degree sweeper, when suddenly *PFFFFff!!* and my back tire is instantly flat. I stop, and start spinning the wheel to look for the little piece of glass I expect to find, so I can pop it out, replace the tube and be on my way, when I saw this...

https://cimg0.ibsrv.net/gimg/bikefor...ac07bcfad4.jpg

No way I was gonna ride that 25 miles home, not even with a boot. So, I made the Call Of Shame. This time, Mrs. GJ had figured out how to use "Find Phone" and Siri to navigate, rather than having to remember or write down my simple directions.

As it turns out, I JUST bought a new one of those (GP5K in 25mm), because I hate not having a spare tire, in case - well, in case THIS happens.

So, an abrupt end to what had been a nice, relaxing ride. I guess Rango will get a walk today, which he usually doesn't on Sundays. Lucky bastard.

EDIT: Because the tire DEflated so completely all at once, I didn't travel far after. So I was able to walk back along my path and find what I think was the culprit. A piece of glass, with a curve that roughly matches the deeper cut about 1.5 cm long by 4 mm wide. I should have taken a picture, but I did toss it over the guard rail and into the grass.

seedsbelize2 07-10-22 04:17 PM


Originally Posted by genejockey (Post 22570125)
I was feeling less than stellar on the bike, possibly still a little under the weather from the double vax, though my HR seemed pretty much what I'd expect. So I decided on a leisurely ride, to cap off what I had decided would be a recovery week. So, there I was, at about mile 31, just starting down a short drop that leads to a 180 degree sweeper, when suddenly *PFFFFff!!* and my back tire is instantly flat. I stop, and start spinning the wheel to look for the little piece of glass I expect to find, so I can pop it out, replace the tube and be on my way, when I saw this...

https://cimg0.ibsrv.net/gimg/bikefor...ac07bcfad4.jpg

No way I was gonna ride that 25 miles home, not even with a boot. So, I made the Call Of Shame. This time, Mrs. GJ had figured out how to use "Find Phone" and Siri to navigate, rather than having to remember or write down my simple directions.

As it turns out, I JUST bought a new one of those (GP5K in 25mm), because I hate not having a spare tire, in case - well, in case THIS happens.

So, an abrupt end to what had been a nice, relaxing ride. I guess Rango will get a walk today, which he usually doesn't on Sundays. Lucky bastard.

EDIT: Because the tire inflated so completely all at once, I didn't travel far after. So I was able to walk back along my path and find what I think was the culprit. A piece of glass, with a curve that roughly matches the deeper cut about 1.5 cm long by 4 mm wide. I should have taken a picture, but I did toss it over the guard rail and into the grass.

Those gp5ks must be as fragile as their 4k predecessors. Daily I tell myself 'that would be a sidewall blowout on a 4k.' Three out of four of my current tires are gatorskins. I'm beyond the point of being even neutral about roadside flats. It hasn't always been so. There was a time when I relished the chance to stop and experience the roadside.

seedsbelize2 07-10-22 04:20 PM


Originally Posted by genejockey (Post 22570125)
I was feeling less than stellar on the bike, possibly still a little under the weather from the double vax, though my HR seemed pretty much what I'd expect. So I decided on a leisurely ride, to cap off what I had decided would be a recovery week. So, there I was, at about mile 31, just starting down a short drop that leads to a 180 degree sweeper, when suddenly *PFFFFff!!* and my back tire is instantly flat. I stop, and start spinning the wheel to look for the little piece of glass I expect to find, so I can pop it out, replace the tube and be on my way, when I saw this...

https://cimg0.ibsrv.net/gimg/bikefor...ac07bcfad4.jpg

No way I was gonna ride that 25 miles home, not even with a boot. So, I made the Call Of Shame. This time, Mrs. GJ had figured out how to use "Find Phone" and Siri to navigate, rather than having to remember or write down my simple directions.

As it turns out, I JUST bought a new one of those (GP5K in 25mm), because I hate not having a spare tire, in case - well, in case THIS happens.

So, an abrupt end to what had been a nice, relaxing ride. I guess Rango will get a walk today, which he usually doesn't on Sundays. Lucky bastard.

EDIT: Because the tire in deflated so completely all at once, I didn't travel far after. So I was able to walk back along my path and find what I think was the culprit. A piece of glass, with a curve that roughly matches the deeper cut about 1.5 cm long by 4 mm wide. I should have taken a picture, but I did toss it over the guard rail and into the grass.

A minor correction

seedsbelize2 07-10-22 04:22 PM

Now that my stamina is returning I'm beginning to dream about a full squish mtb. Dream on. Now that I've done a tiny bit of research, I think I'll convert my 3x8 into a 1x8 and try to add a suspension fork. Or just leave it 3x8 and look for a fork. Writing it down clears things up.

genejockey 07-10-22 05:04 PM


Originally Posted by seedsbelize2 (Post 22570233)
A minor correction

Fixed, thanks.

t2p 07-10-22 05:15 PM

https://cimg1.ibsrv.net/gimg/bikefor...f232331b5.jpeg

Originally Posted by seedsbelize2 (Post 22570239)
Now that my stamina is returning I'm beginning to dream about a full squish mtb. Dream on. Now that I've done a tiny bit of research, I think I'll convert my 3x8 into a 1x8 and try to add a suspension fork. Or just leave it 3x8 and look for a fork. Writing it down clears things up.


t2p 07-10-22 05:17 PM


Originally Posted by big john (Post 22569576)
Anyone see that bike swap the other day?
https://cimg8.ibsrv.net/gimg/bikefor...cadeb44f00.jpg

There is 'Big Gravel' - and 'Big Road'

big john 07-10-22 05:34 PM


Originally Posted by seedsbelize2 (Post 22570239)
Now that my stamina is returning I'm beginning to dream about a full squish mtb. Dream on. Now that I've done a tiny bit of research, I think I'll convert my 3x8 into a 1x8 and try to add a suspension fork. Or just leave it 3x8 and look for a fork. Writing it down clears things up.

Is it the cost that's keeping you from a full suspension bike?

In my opinion there is no reason to change an older bike to a 1by. It doesn't really gain you anything except less risk of dropping the chain.

Most, if not all, suspension forks have been tapered steer tubes for several years. It might be tough to find a fork with a straight steer tube, but I'm sure there are some used ones someplace. The other thing to consider if adding a fork to an older bike is travel. If you add a longer travel fork it changes the geometry and some frames are more affected by this than others. When I've put forks on old frames I have used 63mm and 80mm travel. I had a bike that came with a 100mm fork and my shop put a 130mm fork on it. It made the front end a little wonky at times.

On older bikes some good tires will help and you should experiment with pressures according to the terrain you ride on. On my last bike I bought good tires and ran them at 30 psi in rocky terrain or less if slippery hard dirt. On my newer bike I run 15 psi in the front and 20 in back but they are 2.8 tires.

Mojo31 07-10-22 06:33 PM


Originally Posted by t2p (Post 22570279)
There is 'Big Gravel' - and 'Big Road'

Thats “Big Bike.”

genejockey 07-10-22 06:52 PM


Originally Posted by seedsbelize2 (Post 22570229)
Those gp5ks must be as fragile as their 4k predecessors. Daily I tell myself 'that would be a sidewall blowout on a 4k.' Three out of four of my current tires are gatorskins. I'm beyond the point of being even neutral about roadside flats. It hasn't always been so. There was a time when I relished the chance to stop and experience the roadside.

I wouldn't call it fragile. I got >2000 miles out of the first rear one on the Canyon, and the front's still fine after 2500.

seedsbelize2 07-10-22 06:59 PM


Originally Posted by big john (Post 22570294)
Is it the cost that's keeping you from a full suspension bike?

In my opinion there is no reason to change an older bike to a 1by. It doesn't really gain you anything except less risk of dropping the chain.

Most, if not all, suspension forks have been tapered steer tubes for several years. It might be tough to find a fork with a straight steer tube, but I'm sure there are some used ones someplace. The other thing to consider if adding a fork to an older bike is travel. If you add a longer travel fork it changes the geometry and some frames are more affected by this than others. When I've put forks on old frames I have used 63mm and 80mm travel. I had a bike that came with a 100mm fork and my shop put a 130mm fork on it. It made the front end a little wonky at times.

On older bikes some good tires will help and you should experiment with pressures according to the terrain you ride on. On my last bike I bought good tires and ran them at 30 psi in rocky terrain or less if slippery hard dirt. On my newer bike I run 15 psi in the front and 20 in back but they are 2.8 tires.

Thanks for all the info. In Mexico there are plenty of 25.4mm threaded suspension forks, which is what I need for this bike, an 89? Bianchi Forte. I'm going to buy a cheap one and see if I like it. By cheap I mean US$25. There is no way I can afford full squish, and likely don't need one. I just have flat, rough roads--not even trails.

bampilot06 07-10-22 07:04 PM

GPK5000 fragile? l

genejockey 07-10-22 07:12 PM


Originally Posted by bampilot06 (Post 22570375)
GPK5000 fragile? l

Apparently the idea left bam at a loss for words.

bampilot06 07-10-22 07:14 PM

Doesn’t Compute.

DougRNS 07-10-22 08:13 PM


Originally Posted by bampilot06 (Post 22570385)
Doesn’t Compute.

Reminds me of Pittsburgh legend Donnie Iris

t2p 07-10-22 08:27 PM

https://cimg9.ibsrv.net/gimg/bikefor...943c7a341b.png

Originally Posted by bampilot06 (Post 22570385)
Doesn’t Compute.

it's OK to Compute (er)

genejockey 07-10-22 08:42 PM

Now I have to get ANOTHER spare 25mm GP5K. Unless I apply the logic of the Supply Sergeant on MASH -

"Yeah, I got five of those.
"Great! Can we have one?"
"No! If I give you one, I'll only have four."

big john 07-10-22 09:22 PM


Originally Posted by seedsbelize2 (Post 22570368)
Thanks for all the info. In Mexico there are plenty of 25.4mm threaded suspension forks, which is what I need for this bike, an 89? Bianchi Forte. I'm going to buy a cheap one and see if I like it. By cheap I mean US$25. There is no way I can afford full squish, and likely don't need one. I just have flat, rough roads--not even trails.

Oh, you'll like it. I recommend avoiding elastomer forks and go with an air sprung or even a coil sprung fork. I had an elastomer fork one time and I put a coil spring kit in it. So much better. Came with a damper, too.
Of course an air fork will need a pump to set the pressure. The ones I've used don't seem to leak, though.

An elastomer fork will be better than a rigid fork, despite my prejudice against them.

genejockey 07-11-22 01:48 AM

And this, right here, is why the tire deflated instantly. Same cuts on the tube. Tubeless wouldn't have helped.
https://cimg6.ibsrv.net/gimg/bikefor...2fbb3e6934.jpg

LesterOfPuppets 07-11-22 04:34 AM


Originally Posted by seedsbelize2 (Post 22570239)
Now that my stamina is returning I'm beginning to dream about a full squish mtb. Dream on. Now that I've done a tiny bit of research, I think I'll convert my 3x8 into a 1x8 and try to add a suspension fork. Or just leave it 3x8 and look for a fork. Writing it down clears things up.

I should've jumped on this full squish. These bikes are super fast. I guess I'll have to keep living with my heavier, more metal full squish for now though

https://m.facebook.com/groups/183937...6852838122188/

LesterOfPuppets 07-11-22 04:36 AM

Oh, that's probably not visible because of group settings. 2015 Spec Epic World Cup. For $1425

datlas 07-11-22 06:16 AM


Originally Posted by genejockey (Post 22570560)
And this, right here, is why the tire deflated instantly. Same cuts on the tube. Tubeless wouldn't have helped.
https://cimg6.ibsrv.net/gimg/bikefor...2fbb3e6934.jpg

On Sunday's Donut ride, one rider had a nasty tear in his tread like that. He was riding tubeless and stopped, hoping the sealant would work its magic and he was planning to limp home or make the call of shame. Strava said he had to make the call.

Trsnrtr 07-11-22 06:18 AM

Tubeless isn’t a fix-it-all in every case.

WhyFi 07-11-22 06:38 AM


Originally Posted by genejockey (Post 22570560)
And this, right here, is why the tire deflated instantly. Same cuts on the tube. Tubeless wouldn't have helped.

As Trsnrtr sez, tubeless ain't for everything. That said, 5mm is borderline for a good sealant by itself. These look to be close to that - with some plugs, you probably would have made it home without the call of shame. Supposedly, Silca's new sealant takes this up a notch or three, as well.

datlas 07-11-22 06:43 AM


Originally Posted by Trsnrtr (Post 22570641)
Tubeless isn’t a fix-it-all in every case.

Agree. I bit my tongue, but I could not help but wonder if the rider in question could have put in a boot and a tube and limped home. He is a fairly experienced cyclist so that's why I kept my thoughts to myself.

WhyFi 07-11-22 06:45 AM

Finally back home after two long days of driving; 600 - 700 mile days, family on-board, can be grueling, even more so when dealing with rain a significant portion of each day. It's funny - it was supposed to rain almost every day that we were in VA, but it never did until we packed up and left. I guess that we should be thankful for that.

Oh, the longer of the two days brought us within ~25 miles of the Buc-ee's outside of Lexintington, KY, but I wasn't about to add another hour of driving just to make a gits-and-shiggles detour.

rjones28 07-11-22 06:50 AM


Originally Posted by genejockey (Post 22570560)
And this, right here, is why the tire deflated instantly. Same cuts on the tube. Tubeless wouldn't have helped.
https://cimg6.ibsrv.net/gimg/bikefor...2fbb3e6934.jpg

:(

WhyFi 07-11-22 06:50 AM


Originally Posted by datlas (Post 22570659)
Agree. I bit my tongue, but I could not help but wonder if the rider in question could have put in a boot and a tube and limped home. He is a fairly experienced cyclist so that's why I kept my thoughts to myself.

Sure - any tubed fix is an option with tubeless, even with "tubeless only" wheels. Since I like to get pretty far afield on occasion, and I'm not a fan of the call of shame, I still carry a boot and tube for this reason; he may not have been carrying, though. Wouldn't have hurt to have made the offer. Also, a lot of fairly experienced cyclists are still fairly inexperienced with the ways of tubeless.

seedsbelize2 07-11-22 06:53 AM

Wordle 3/6


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