700x?? tires if you know you're going to hit gravel?
I'm looking at several hybrids, most of which come with either 700x32 or 700x35 tires, although one is a 28. My concern is that while I'm riding mostly paved roads, it's often in the country where there might be gravel strewn across the road at times or I could end up in the shoulder (larger than pea gravel) for a brief stint. Should I plan on 35s at a minimum, or what do you think?
I also pull a Burley (60 pounds+) sometimes for shorter distances, so not sure if that is a factor for tires. Or, rather than width, is the bigger issue the lack of tread on some of the thinner tires? I think my LBS will trade out the tires, but I want to understand better what my needs are before I talk to them. Thanks so much! |
Mine came with 35's...
I guess when you buy a hybrid you know you're not buying a road bike and a lack of speed shouldn't come as a surprise. But then again speed is a good thing! The tread will make a big difference to the speed you get from a tire. Have a look at the Schwalbe website...they rate their tires on speed, grip, protection, etc...you'll get a good idea of what treads, types of tires in 35s provide less rolling resistance and provide more speed. I have Racing Ralphs...they're written up as a good allround tire with tread for offroad and very low rolling resistance. I love them...but then again I have a hybrid so speed isn't my #1 priority. |
Do not let the choice of bike be influenced by the tires that come with it.
Choose a bike first and then decide which tires you want ... the LBS should put them on for you and deduct the cost of the old tires from the price of the new ones ... if not it's not a good LBS in my opinion. Same goes for saddles. What lexy said about the Schwalbe Racing Ralphs is very true ... they are great tires although quite expensive. I use the Schwalbe CX Comp tires ... they are quite light and fast rolling for their relatively cheap price. They have excellent puncture protection too ... haven't had a single flat in over 1000 miles now riding on all kinds of bad Belgian roads and tracks. They are "cyclocross" tires, meaning that they have smooth middle part for doing roads and then they have a knobby bit on the sides for when you hit gravel or mud or similar offroad things. Might be worth checking out other tires as well made by Michelin or Ritchey ... they've got some nice dual purpose cyclocross tires. |
Originally Posted by Mysterious Lady
(Post 12817508)
I'm looking at several hybrids, most of which come with either 700x32 or 700x35 tires, although one is a 28. My concern is that while I'm riding mostly paved roads, it's often in the country where there might be gravel strewn across the road at times or I could end up in the shoulder (larger than pea gravel) for a brief stint. Should I plan on 35s at a minimum, or what do you think?
I haven't attempted to pull our trailer yet with the new bike, so I can't speak to that part of your concerns. |
Originally Posted by AdelaaR
(Post 12817939)
Do not let the choice of bike be influenced by the tires that come with it.
Choose a bike first and then decide which tires you want |
OK, thanks guys! Now, to further show my ignorance... I thought that have a wider/narrower set of tires would necessitate a completely different wheel (rim, etc) as well. Then after reading big_al's thread switching down to 700x28s I thought maybe all that didn't get replaced. So is that right? Can you just replace the actual tire, assuming the difference isn't too huge? And is that something I could learn to do on my own?
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Yes, you can just swap tires.
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Loose gravel on a road can be the worst - especially the way it collects in the corners of your favorite downhills.
According to Sheldon Brown & others, cornering is detrimentally affected by knobby tires because the knobs get squished to the side & then suddenly your weight is transferred to them and you topple. I can vouch for this - its a fairly close approximation to the frequent wipe outs I had when I was too young to feel the pain. So whatever tires you go with, try to avoid knobs - even the "combined tread" knobs on the side of a slick in the middle tire. People say narrower tires are fine off road. Other people like me say you can roll on the road fine on wider tires. |
Originally Posted by AdelaaR
(Post 12817939)
Do not let the choice of bike be influenced by the tires that come with it.
Choose a bike first and then decide which tires you want ... the LBS should put them on for you and deduct the cost of the old tires from the price of the new ones ... if not it's not a good LBS in my opinion. |
I had the same question about tire grip in gravely areas, though I ride a road bike with narrow tires. Many people (BF and irl) told me that when it comes to gravel, no tire size or tread size is going to make a big difference. Even with really grippy tires, gravel gets under your tire in such a way that it can cause a skid. For that reason I went ahead and chose some normal road tires so I can have fun and go fast. I'll just have to avoid the gravel if I can.
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Originally Posted by cranky velocist
(Post 12818698)
People say narrower tires are fine off road. Other people like me say you can roll on the road fine on wider tires.
You could also ride your porche through the woods, so to speak. Using wide tires on roads though makes total sense, depending on your average speed and the state of the roads they may actually make you faster. |
All spring I rode a 12 mile stretch of soft, wet, limestone trail with the occasional patch of loose gravel thrown in for variety on 32 mm tires. Then as my century training progressed I rode it some more on my 28 mm road training tires. Then I rode it once more on my 25 mm road tires. I did not have any trouble on any of those tires. The 32s have side knobs and a light tread, the 28s are semi-treadless, and the 25s are as smooth as a baby's bottom. If all your riding is on steep gravel grades you definitely want tires made for that. Under the conditions you describe anything 28 mm or bigger will do quite nicely. The thing that makes me want tires as wide as 38 mm is that same portion of the trail when horse's hooves have turned it into the moral equivalent of cobblestones or the local "paved" roads whose margins are crumbling asphalt and potholes. One nice thing about wide tires is that they will handle a very wide range of road conditions and that is very good when things turn rougher than you expected. If it were me and the LBS was willing to swap out the tires I would go for 38s if they fit the bike.
Sheldon Brown's chart is out of date and he, unfortunately, is no longer with us and cannot update it. Schwalbe has the current ETRTO rim/tire width recommendations. Even the Schwalbe chart is behind industry practice, people are putting 23 mm tires on 17-19 mm rims and getting great results. Ken |
Originally Posted by AdelaaR
(Post 12819394)
Narrow race tires can be used offroad, but it would be foolish to do so.
You could also ride your porche through the woods, so to speak. Using wide tires on roads though makes total sense, depending on your average speed and the state of the roads they may actually make you faster. |
I would say 35's or 38's for gravel riding.
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Originally Posted by cranky velocist
(Post 12820129)
I dunno, cyclo-cross riders tend to run with what I consider 'narrow' tires & I have seen some impressive tributes to their off road capabilities.
Ken |
I regularly ride short distances (<1 mi) of small rock/gravel on 25s. I've had flats but curiously always from road debris. Just keep your tire pressure up if you're going to have skinnier tires.
I believe some pros ride 25s or 23s? in cobblestone races like Paris-Roubaix - not gravel but probably as bad on tires. |
Originally Posted by Mysterious Lady
(Post 12818166)
OK, thanks guys! Now, to further show my ignorance... I thought that have a wider/narrower set of tires would necessitate a completely different wheel (rim, etc) as well. Then after reading big_al's thread switching down to 700x28s I thought maybe all that didn't get replaced. So is that right? Can you just replace the actual tire, assuming the difference isn't too huge? And is that something I could learn to do on my own?
Up to a point you can swap tyres without having to swap wheels. I've seen wheels that listed a minimum tyre width. I haven't seen a wheel that listed a maximum tyre width but then I've never gone looking for them so they may well be out there. Make sure your inner tube is suitably rated if you're changing the width of your tyre. For general all-round use I've found my Schwalbe Marathon Extreme to be great. It's got enough grip in the mud to be useable and a low enough rolling resistance to work on the road too. I've taken mine on muddy trails and also done long-distance rides on the road on it. It's not going to hold up to extreme mud like other MTB tyres might but then if you're riding a hybrid you're probably not overly worried about that. |
ken/khutch, thanks for the tire/wheel chart! I missed it yesterday.
I agree about road conditions being rougher than off road conditions sometimes - expecting it while riding in a low gear is better than not expecting an obstacle in a high gear. Or, i suppose, being stuck with an obsticale for an entire century. And those paved trails? They can be the worst. We have a couple gaps in the pavement around here that get. me. every. time. |
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