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bobknh

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This article is more positive news about Compass Bon Jon's. The source is Compass; but the interview is a good read: https://janheine.wordpress.com/?utm_source=Retail+Customer+Newsletter&utm_campaign=c2771d3812-Drew_Wilson_2017_04_13&utm_medium=email&utm_term=0_f74fbd5ca8-c2771d3812-108609665&mc_cid=c2771d3812&mc_eid=2e5f71b642
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Smale Rider

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Only interesting thing in the whole read as the 38 Tubeless Barlow pass coming soon...

Then I got sidetracked to panaracers website (because they actually make compass tires) and found that the gravelking SK tubeless is now officially a 38 tubeless and a 43 tubeless (probably old 40)
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BrownDog

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Reply with quote  #3 
After about a month on my Bon Jon tubeless they have grown to 37mm. They leak very bad out the side wall even with 4oz of orange seal. Great for road, sand and smooth gravel. I would not dare to take them out to the mid west.
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bobknh

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Quote:
Originally Posted by BrownDog
After about a month on my Bon Jon tubeless they have grown to 37mm. They leak very bad out the side wall even with 4oz of orange seal. Great for road, sand and smooth gravel. I would not dare to take them out to the mid west.

Thanks for the feedback on the Bon Jon's. I haven't mounted mine tubeless yet. I was planning to do so soon. Do you have the standard weight model, or the light weight which I purchased? If you went with the light weight version as I did, perhaps that accounts for some of the leakage issues? In the meanwhile, I've been running mine at around 40 PSI with light weight Schwalbe tubes. They are awesome - even with butyl tubes. I may just continue with tubes until I start getting pinch flats. Today was my first day on NH muddy dirt and gravel roads. They performed flawlessly - even on some moderately soft muddy stretches of road. I was impressed that they didn't cake up with mud, and gave me some reasonable traction -- even though I did slide around a bit. 
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goneskiian

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Isn't the sliding around part of the fun of riding gravel? ;-)
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bobknh

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Quote:
Originally Posted by goneskiian
Isn't the sliding around part of the fun of riding gravel? ;-)

Yup -as long as you stay vertical. Today I hit some deeper mud - and a trail with packed snow on top of a few inches of rotting leaf litter. The Bon Jon's continue to function well. No mud caking up; good traction. The NH mud I'm riding through is very sandy though. Maybe in mud with more clay, I wouldn't be so happy.
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bobknh

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Quick update on my Bon Jon's: Another NH day of mud, gravel (some washed out areas with lose 2" gravel), lots of unavoidable potholes etc. Roads are about as bad as I can remember them. Running the Bon Jon's with light Scwalbe tubes at 40 PSI. So far, I'm delighted. No pinch flats despite wacking a few potholes on fast decents. Good, if not great traction in the softer muddy sections. More mud on my bike and me than on the tires, which shed the mud almost instantly. Wish I could mount full fenders on my Swiss Cross though. BTW, the Paul's Minimoto linear pull rim brakes with salmon koolstop pads work great in the wet stuff.
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BrownDog

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I have the light weight model. 
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bobknh

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Quote:
Originally Posted by BrownDog
I have the light weight model. 

Hmmmm - so do I. I haven't tried to mount them tubeless yet. But ... I'm having good luck with light weight Schwalbe tubes at 40 PSI. I rode them on high speed group rides in SC; and now on messy dirt and gravel in NH. Maybe light weight tubes are the way to go with the light version of the Bob Jon's. Bummer - after all the work and effort you put into your tubeless installation. I may still give a tubeless install a trial though.
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BrownDog

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Bobknh - Where are you in SC? I am in Blythewood.
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bobknh

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Quote:
Originally Posted by BrownDog
Bobknh - Where are you in SC? I am in Blythewood.

Hi BrownDog - During the winter I stay on Hilton Head Island. We aren't exactly neighbors - about a 3+hr drive to Blythewood depending on I95 and 26. We have close family moving to Columbia, which is much closer to you though. Likely to run up to Columbia for some family visits next winter. BTW, despite the HHI Chamber of Commerce hype - HHI is an awful place to ride a bike. The only unpaved riding is on the packed sand of the 12 mile beach. When I'm down there I ride with a small group of decent riders (18-20+ mph steady paceline) in the private plantations.
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BrownDog

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Let me know when you are back down here. We have some good gravel around here. While on the coast make your way to the ace basin and you will be able to ride all day on dirt/ pavement with very few cars. Also you can make a day trip and ride the Hell Hole Gravel Grind loop.
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bobknh

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Quote:
Originally Posted by BrownDog
Let me know when you are back down here. We have some good gravel around here. While on the coast make your way to the ace basin and you will be able to ride all day on dirt/ pavement with very few cars. Also you can make a day trip and ride the Hell Hole Gravel Grind loop.

Thanks - back on HHI next Dec. Hope to venture off island more next winter. Will likely visit Columbia a few times. Where is the Ace Basin? How far from HHI?
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Lbc

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Reply with quote  #14 
i got the standard casing for iowa gravel.. mounted to a belgium+ rim they measure 37.5 after a couple months of use. I run them tubeless witn ZERO weeping issues. I love these things.  no punctures yet that the orange seal hasnt fixed anyway.. a buddy sent me a disturbing pic of his rear tire with a non fixable gash so thats a little disheartening but no issues with mine so far.  I judge everything against the gravel king sk and I would say that the compass is def more supple, better riding tire but it feels like your giving up a bit in durability.  I havent encountered this yet but its on my mind as i ride where as the GK i have no reservations at all. 
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bobknh

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Reply with quote  #15 
Quote:
Originally Posted by Lbc
i got the standard casing for iowa gravel.. mounted to a belgium+ rim they measure 37.5 after a couple months of use. I run them tubeless witn ZERO weeping issues. I love these things.  no punctures yet that the orange seal hasnt fixed anyway.. a buddy sent me a disturbing pic of his rear tire with a non fixable gash so thats a little disheartening but no issues with mine so far.  I judge everything against the gravel king sk and I would say that the compass is def more supple, better riding tire but it feels like your giving up a bit in durability.  I havent encountered this yet but its on my mind as i ride where as the GK i have no reservations at all. 

Thanks for the info. I was basing my caution on an earlier discussion thread about issues with running the Bon Jon's tubeless. It turned out that both the original poster and I both purchased the ultralight sidewall version. While I haven't tried to mount mine tubeless, the original poster, had trouble keeping his inflated despite several infusions of Orangeseal endurance sealant - with no obvious leakage at the rim seat or valve. That scared me off a bit; but so far I'm delighted with the Challenge latex tubes, which seem to be very flat resistant, and a lot less hassle than mounting the Bon Jon's tubeless. Regardless, they are great tires, and I would highly recommend them. But if I were definitely going tubeless, I would opt for the standard sidewall version.
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Dodger

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Reply with quote  #16 
Quote:
Originally Posted by bobknh

But if I were definitely going tubeless, I would opt for the standard sidewall version.


I had no real issues setting up the EL version tubeless. Definitely needed a flash charge 'cause a pump would not do it. Using Orange Seal Endurance there was no sealant leakage on the sidewall or anywhere else. I had to pump them up every few days, but since I check tire pressure for every ride this wasn't an issue for me.

What was an issue is that the front tire failed at about 650 miles. I was riding and, without apparent reason, I had a catastrophic sidewall failure. I successfully booted it and used a tube to get back home. This happened on pavement with no debris on the road. I could not tell if there was a pre-existing cut although I had run the tires on a couple hundred miles of pea gravel/sand/hard pack (balance on pavement).

Since the remaining tire still has good tread life remaining I am planning to get another tire to finish them off but not sure I will buy again after that. I'm enjoying the Hutchinson Overide as an alternative for now -- 35 is specified tubeless compatible but 38 is not -- it has a good rolling diamond file on center tread but it's not quite as supple as the BJP/EL.
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bobknh

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Reply with quote  #17 
Quote:
Originally Posted by Dodger


I had no real issues setting up the EL version tubeless. Definitely needed a flash charge 'cause a pump would not do it. Using Orange Seal Endurance there was no sealant leakage on the sidewall or anywhere else. I had to pump them up every few days, but since I check tire pressure for every ride this wasn't an issue for me.

What was an issue is that the front tire failed at about 650 miles. I was riding and, without apparent reason, I had a catastrophic sidewall failure. I successfully booted it and used a tube to get back home. This happened on pavement with no debris on the road. I could not tell if there was a pre-existing cut although I had run the tires on a couple hundred miles of pea gravel/sand/hard pack (balance on pavement).

Since the remaining tire still has good tread life remaining I am planning to get another tire to finish them off but not sure I will buy again after that. I'm enjoying the Hutchinson Overide as an alternative for now -- 35 is specified tubeless compatible but 38 is not -- it has a good rolling diamond file on center tread but it's not quite as supple as the BJP/EL.

Very interesting. One concern with very flexible sidewall construction is that there is probably a trade off between suppleness and cut resistance. Also, there may be durability issues. I know the manager of the local bike shop in our area. He is a very active mountain biker, and leads a weekly mountain bike ride from his shop every Tuesday evening. He showed me his mountain bike tire sidewalls which were cracking. He explained that the cracking was caused by the extra flexing of the very supple, low pressure tubeless tires he uses. Apparently, the flexing of the soft tires can cause the the actual fibers of the casing to eventually fatigue and crack. I don't ride as much as you - about 100 to 120 miles a week on mixed paved and maintained dirt roads. I've ridden my Bon Jon's about 800 miles at 30-35PSI  with no sign of sidewall damage or deterioration. Unless your tire was cut by a rock or road debris, I can't imagine your front Bon Jon failing at 650 miles --- unless it was defective. I've contacted Compass several times by e-mail. They respond promptly, and seem like a good company for customer service. If you haven't contacted them, I'm sure that they would want to know about your tire failure. Perhaps they will give you a partial refund or replacement.
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