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Old 01-19-07, 02:38 PM   #1
deadly downtube
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New to trailers. Flat tires?

I bought a bob trailer for 60 bucks off of craigslist two years ago and haven't used it, but was planning on using it for a ride to Texas from California... Was curious if the bob trailer is as likely to get a flat tire as the bicycle tires? Also, perhaps a bob tire recomendation for touring? I'm not even sure what size the wheel is, or what size tubes they take.. anyone?
many thanks
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Old 01-19-07, 03:11 PM   #2
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Bob has a 16" wheel. I'd use something like a Schwalbe marathon.
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Old 01-19-07, 04:52 PM   #3
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Unless they have changed, the tire it comes with is low quality. Since you should carry a spare, I would just use it and carry the spare under the bag on the trailer deck. I would also carry spare bearings and skewer. the latter is notorious for breaking. Mine never broke after over 10000 miles but my friend's broke within the first 500. Possible he tightened too much but I have heard of others breaking. I was also told by Bob there is a lot of variance in how long their bearings last. They said anywhere between 1000 miles to riding across Russia w/out a problem.
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Old 01-19-07, 06:42 PM   #4
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A BOB flat will ruin your day unless you at least have a tube. Tires too are subject to the usual issues, so it is not a bad idea to carry spares of both. I also would use a Marathon and toss the Taiwan tire that the BOB comes with. My Taiwan OEM performed for 4000 miles, but the Marathon will allow more than 35 lbs pressure, so less rolling resistance with unnoticeably more bounce.
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Old 01-19-07, 06:55 PM   #5
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Quote:
Originally Posted by aroundoz
Unless they have changed, the tire it comes with is low quality. Since you should carry a spare, I would just use it and carry the spare under the bag on the trailer deck. I would also carry spare bearings and skewer. the latter is notorious for breaking. Mine never broke after over 10000 miles but my friend's broke within the first 500. Possible he tightened too much but I have heard of others breaking. I was also told by Bob there is a lot of variance in how long their bearings last. They said anywhere between 1000 miles to riding across Russia w/out a problem.
I pulled my BOB from Boston to Wichita, no flats (not on the trailer anyways) no bearing or real skewer problems (bent mine a bit from all the weight) carried up to 80-100 Lbs. Pulled it over pavement,railtrail,singletrack,thru muck,mud,rain,in VERY dusty conditions,(The Erie Canal's Stone Dust) over curbs,potholes,kids,cats,trashcans and the occainal (sp) Volvo. Not to say that others havent had problems,in my case it wasnt the trailer that gave me grief,it was the spokes on my rear wheel (Broke 5 of 'em,),all the weight of the BOB rests on the rear axel of the bike.A good soild,high spoke count rear wheel,built by a GOOD wheel builder is money VERY well spent!!!!!

PS....Tho it is a fast way to park a BOB and bike DO NOT use the "Jackknife" method. (swinging the bike and trailer around so that the trailer keeps the bike uprite...hell on rear spokes!!
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Old 01-19-07, 08:18 PM   #6
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[QUOTE=The Figment] Not to say that others havent had problems,in my case it wasnt the trailer that gave me grief,it was the spokes on my rear wheel (Broke 5 of 'em,),all the weight of the BOB rests on the rear axel of the bike.

Not true. I did a little experimenting and discovered that when one places 40 lbs on the trailer the BoB transfers about 15-17 lbs to the bike's rear axel. That's a lot less than rear panniers carrying the same cargo would place on the rear wheel. Of course, it depends somewhat on how the BoB is loaded, but a reasonable weight distribution keeps an awful lot of weight off your bike's rear axel.

A good soild,high spoke count rear wheel,built by a GOOD wheel builder is money VERY well spent!!!!!

Absolutely

I purchased two Schwalbe Marathon tyres from good ol' Nashbar for under $16 each. I think they may still have some, but haven't checked recently. These are really excellent BoB tyres. I'd suggest you get at least one.
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Old 01-19-07, 09:02 PM   #7
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thanks so much for all the helpful info guys!!
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Old 01-21-07, 07:34 AM   #8
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Another good addition is a schrader to presta adapter for the BOB rim. It's a 50 cent aluminum slieve that allows you to convert over to Presta tubes (which I'm assuming that you bike uses). Same bike pump for trailer and bike. I definitely agree with ditching the POS tire that the BOB comes with, what were they thinking? Trailer tires rarely get flats, I personally don't think you need to bring a spare tire, the odds of you destroying a high quality 16" tire to the point of it being unusable to the next town are very remote. Just bring a spare tube.

I have made several modifications to my BOB that you might find helpful.


http://www.crazyguyonabike.com/doc/p...e_id=9172&v=9v
http://www.crazyguyonabike.com/doc/p...e_id=9173&v=9x
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Old 01-21-07, 08:16 AM   #9
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The BOB tire can become unuseable when you get the mysterious, invisible, unable to find sharp object that nevertheless puctures tubes. This can happen to a 10 mile tire as well as a 10000 mile tire. You can take your chances, but since this actually happened to me in the middle of nowhere B.C., my perceived probability of occurance is higher than for others where this event remains merely a theoretical possibility. +1 on the presta conversion. It's no fun losing your pump's schraeder to presta conversion parts while on the road.
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Old 01-21-07, 08:34 AM   #10
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Oops, how could I forget "the mysterious, invisible, unable to find sharp object that nevertheless punctures tubes".

Belt and suspenders methodology works, that's for sure.
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Old 01-21-07, 08:41 AM   #11
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Quote:
Originally Posted by vik
Bob has a 16" wheel. I'd use something like a Schwalbe marathon.
I think there are two variations of the 16" tire and you have to get the right one, just can't remember the difference sorry.
But here is a site that has a good selection of tires for the BOB.

http://biketrailershop.com/catalog/i...f63537eb52b897
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Old 01-21-07, 03:31 PM   #12
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Quote:
Originally Posted by gregw
I think there are two variations of the 16" tire and you have to get the right one, just can't remember the difference sorry.
But here is a site that has a good selection of tires for the BOB.

http://biketrailershop.com/catalog/i...f63537eb52b897
The bob yak trailer takes a 305 ISO tire (bead seat diameter ~12").

They currently ship with a cheng shin 16x1.75 tire with a 35 psi limit, which seems a little low to me. The tire does look a little on the cheap side and is actually 1.5 inches wide.

I believe all of Performance's branded tires (forte etc) are in fact made by cheng shin. I'm getting some fair mileage (5,000 so far, unloaded bike, only slight sign of wear on rear only) out of some forte 26x1.5 60 psi tires, which are actually ~1.35" wide. I paid only 7 USD each for them - they seem to be a cheap substitute for ritchey tom slicks. So, you don't always get what you pay for.

As gregw suggested, I have a presta valve tube as a spare, and a rim hole adapter attached. One less thing to worry about.
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Old 01-22-07, 11:14 PM   #13
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thanks for more great tips people!
I hope I got the right tire coming in the mail... it said 16 x 1.75 so I figured it would work.. it's a schwalbe marathon..
do these trailers break spokes normally? with my fingers, the spokes all feel uniformly tensioned, but, that's all I can tell.
Only reason I am using a trailer this time is because my g/f is coming with me, and she's not terribly strong, so I figure I might alleviate some of her pannier load if she's tired... there's no way she can complain if I am hauling both our gear and she is riding a bare bike up the mountain, lol.
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Old 01-23-07, 02:59 AM   #14
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Assume nothing.
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Old 01-23-07, 07:22 AM   #15
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There is always a way for a g/f to complain !
Those little 16" rims are pretty tough, I don't think I've ever heard of someone breaking a spoke.

Maybe he should bring a spare rim, what do you think Cyclesafe?
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Old 01-23-07, 08:26 AM   #16
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Has anyone tried the Schwalbe Marathons on the Burley Nomad, or know if they will fit? They are also 16 x 1.75, but I cannot find an ETRTO number on the tires. From what ive read about tire sizing, the ETRTO is more accurate size. On the rim of my Nomad tires,a sticker says 305 x 20. That looks like the ETRTO reversed. The 16 x 1.75 Marathons are 47-305. That 20 doesnt look right to me.

My Burley d'lite trailer has 20 x 1.75 tires, and it says 47-406 on the tire, but on the rim, it has the sticker that says 406-20. The d'lite tires are wider than the Nomads tires.

Urg. I wish the Nomad tires had that ETRTO # on it, so I could be sure. There is some wierd # on the tires that say IA-2601-06. Have no clue what that # is.
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Old 01-23-07, 01:06 PM   #17
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hrm well i checked the tire that came with my bob yak, says 16 x 1.75... soooooo, don't see why schwalbe marathon 16 x 1.75 wont work! crossing fingers..

should I bring a spare quick release axel?
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