Bike for newbie concerned about thin tyres
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Bike for newbie concerned about thin tyres
Postby Dagzb » Tue Feb 12, 2013 2:00 am
I'm a newbie here and have found this forum a great source of info so figured I would ask the question.
I'm a 44 yo small light guy who has recently jumped back on to my old MTB and have been loving being back on the bike. Mainly I ride on weekend for fitness but thinking (maybe) of commuting as well. Considering a road bike such as Trek 1.2, Defy 3/2, CAAD 8 or Specialized Allez based on this forums feedback and reviews ( have not tested any yet, just research) as want a relaxed Geo and a spend around 1k. But I'm not keen on going from 1.5 in (presumably 38mm) tyres on the MTB to 23 of the road bikes mainly due to comfort and more sure footing even though will mostly be on road and paths. I have considered flat bar like trek 7.3 fx but think it would dissapoint me and CX bikes seem expensive and aggressive.
So can I run 28 or 32 tyres on the type of road bikes mentioned (am I dreaming) or are there some other options for drop bar road bikes with wider tyres that I have not considered before I start venturing into LBS. Thanks heaps
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Re: Bike for newbie concerned about thin tyres
Postby Ozkaban » Tue Feb 12, 2013 8:31 am
I've found the grip/stability of 23mm tyres is excellent. Don't worry about this aspect. Get good tyres though - it's worth buying grippy tyres even if they wear out faster. I use Conti GP4000s tyres and they're great and can be had for about $40 online.
A lot of road bikes will take slightly larger tyres. 25 should be fine and many bikes with more relaxed geometry will take 28s. Check clearance between the tyre and the seat tube as well as between the chain stays (some come in pretty tightly there) and at the top of the fork.
Cheers,
Dave
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Re: Bike for newbie concerned about thin tyres
Postby clackers » Tue Feb 12, 2013 1:44 pm
As I understand it, Dagzb, the dual pivot mechanism of modern road bikes relies on acting only over a short distance, so along with fork clearance you may have to look at CX bikes with their cantilever or disk brakes, or a flatbar with V brakes.Dagzb wrote:
So can I run 28 or 32 tyres on the type of road bikes mentioned (am I dreaming) or are there some other options for drop bar road bikes with wider tyres that I have not considered before I start venturing into LBS. Thanks heaps
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Re: Bike for newbie concerned about thin tyres
Postby Howzat » Tue Feb 12, 2013 2:32 pm
Most road bikes will take 25mm tires, but not wider than that.
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Re: Bike for newbie concerned about thin tyres
Postby Nobody » Tue Feb 12, 2013 2:47 pm
Generally not. If not cyclocross, then have a look at touring or commuter bikes (also called asphalt). Specific long distance comfort road bikes may take larger than 25. As said above, most road bikes are only good for 23 or 25s.Dagzb wrote:So can I run 28 or 32 tyres on the type of road bikes mentioned (am I dreaming) or are there some other options for drop bar road bikes with wider tyres that I have not considered before I start venturing into LBS.
In my opinion 23s can be very grippy, but are not particularly stable compared to wider tyres. The two problems with 23mm tyres are:
Higher pressures which cause the bike to bounce more on rougher roads or debris and so are less forgiving.
Thinner tyres are more likely to track irregularities in the road or get knocked off course by surface edges.
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Re: Bike for newbie concerned about thin tyres
Postby scirocco » Tue Feb 12, 2013 3:30 pm
Tyre pressure plays a big part in comfort. Run them at 85-90psi for a light guy and they will be noticeably more comfortable than at 110psi.
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Re: Bike for newbie concerned about thin tyres
Postby sblack » Wed Feb 13, 2013 12:36 pm
This won't be an issue while riding as there is heaps of tyre clearance around the brakes, you'll most likely run into frame clearance issues well before brake clearance. The issue the brakes will have though is that the tyre may need to be deflated in order to remove and reinsert the wheel, or you may be able to work around it by using the brake adjustment barrel to open them up but don't forget to readjust when the wheel is back on.clackers wrote:As I understand it, Dagzb, the dual pivot mechanism of modern road bikes relies on acting only over a short distance, so along with fork clearance you may have to look at CX bikes with their cantilever or disk brakes, or a flatbar with V brakes.
As others have mentioned, lower pressures will help with comfort but don't expect the cushiness of the MTB regardless of tyre size you choose. Grip of the skinnier tyres in the dry should be fine, in the wet it will depend on your tyre choice and in that regard I found the better gripping tyres tend to be the 'performance' end of the range and in that regard availability is very limitted in wider sizes. I'm fairly confident that a 23 or 25mm GP4000S will outpeform a 28 or 32mm Gatorskin in terms of wet weather grip.
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Re: Bike for newbie concerned about thin tyres
Postby Dagzb » Thu Feb 14, 2013 1:41 am
Thanks again
Dagz
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Re: Bike for newbie concerned about thin tyres
Postby clackers » Thu Feb 14, 2013 11:03 am
You can get longer reach DP calipers, but they flex more, affecting performance, hence touring bikes with cantilevers.sblack wrote: This won't be an issue while riding as there is heaps of tyre clearance around the brakes, you'll most likely run into frame clearance issues well before brake clearance.
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Re: Bike for newbie concerned about thin tyres
Postby CXCommuter » Thu Feb 14, 2013 12:31 pm
A year ago I came from exactly your position, ex MTBer (although with busted knees) and 20kg overweight. I was concerned with the longevity of road bikes, wheels and tyres as I tend to be rough on equipment. After a lot of research I ended up buying a Giant TCX cyclocross bike as it does everything you are asking for. It is more laid back so rides a bit more like a MTB. It has cantilever brakes and lots of clearance so you can run up to 32-36mm tyres or thin 23-25mm tyres and is not particularly heavy compared to road bikes in the same price range (9-9.5 kg). If you are lucky you might pick up a 2012 TCX 1 for about a grand.
I have run 25mm continental gatorskins and 28mm Schwalbe durano pluses, the 28mm tyres have a very slight speed reduction (weight and drag) but are much more comfortable and the schwalbes are excellent for puncture resilience. Otherwise I also swapped out the front large chainring for a 53 tooth as I am solely road or cycle path only. I also do regular road riding (every saturday) and can ride with the group and on front as needed and do not feel I am at a disadvantage
I am completely happy with the purchase in all aspects and now upgrading the bike (new wheelset- prolite braccianos) which should strip half a kg from the weight of the bike.
Basically don't rule out a cross bike as they are much more versatile and can run the larger tyres you want and are a bit more like a MTB to ride.
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Re: Bike for newbie concerned about thin tyres
Postby Dagzb » Sat Feb 16, 2013 4:09 pm
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Re: Bike for newbie concerned about thin tyres
Postby gbh » Tue Feb 19, 2013 10:42 am
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Re: Bike for newbie concerned about thin tyres
Postby clackers » Tue Feb 19, 2013 4:06 pm
Definitely, GBH ... there's real weight on the front wheel. A descent with corners should be done 'in the drops'.gbh wrote:. I suspect you might be surprised. I went from riding a hybrid with an upright position 28m tyres to a road bike. There is definitely no loss of stability. In fact, handling is generally better, and when it comes to cornering at speed, the road bike is massively superior ... .
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Re: Bike for newbie concerned about thin tyres
Postby durianrider » Tue Feb 19, 2013 5:49 pm
Take it easy on your first few rides. Get the feel of any new tyre/change in handling.
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Re: Bike for newbie concerned about thin tyres
Postby Nobody » Wed Feb 20, 2013 8:31 am
You probably have good reasons to do descents in the drops, like better brake leverage and better aero. But according to my scales there is more weight on the front wheel while on the hoods (at least on my bike).clackers wrote:Definitely, GBH ... there's real weight on the front wheel. A descent with corners should be done 'in the drops'.
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Re: Bike for newbie concerned about thin tyres
Postby clackers » Wed Feb 20, 2013 9:41 am
Must be something about your setup, Nobody. Stretching to the drops should take people's torsos further forward and lower, and that new weight distribution is great for control but can lead to hand numbness and lower back pain.Nobody wrote: But according to my scales there is more weight on the front wheel while on the hoods (at least on my bike).
See https://fitwerx.com/road-or-tri-position" onclick="window.open(this.href);return false; for the obvious example - aero bars.
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Re: Bike for newbie concerned about thin tyres
Postby Paddles » Wed Feb 20, 2013 1:45 pm
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Re: Bike for newbie concerned about thin tyres
Postby durianrider » Wed Feb 20, 2013 1:49 pm
Be aware that machining away metal from brakes prolly aint the smartest thing to do. Its akin to drilling holes in handlebars to save weight.Paddles wrote:The big thing to check with 28's is the increased profile height clashing with the brakes or the seat tube, generally the fork crown is high enough. I use 28's, triple butted spokes and nice strong Campy Omega 19's on my 1990 Shogun because our local roads are pretty ordinary, plus at 115kg and 6 foot i'm a heavy boy and they fit ok. I have had to machine away a little of the underside of the front brake caliper however to give me a bit of clearance though.
I can hear some people now saying 'whats wrong with that?'.
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Re: Bike for newbie concerned about thin tyres
Postby Nobody » Wed Feb 20, 2013 3:03 pm
I'd go as far to say that most people who know enough to do parts machining also know enough about the associated risks.durianrider wrote:Be aware that machining away metal from brakes prolly aint the smartest thing to do. Its akin to drilling holes in handlebars to save weight.
I can hear some people now saying 'whats wrong with that?'.
Here's some others to consider:
Carbon, Al, or for that matter 1" steel fork steerers where you can't even see a crack developing.
Carbon handlebars to that can fail suddenly.
Road bike front forks with only a small amount of room between the tyre and fork crown. They can get sticks and D shackles caught in there causing an instant superman impression.
Hard inflated 23mm tyres that can be very unforgiving if you hit something you missed seeing on the road (which I covered in an earlier post).
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Re: Bike for newbie concerned about thin tyres
Postby Paddles » Wed Feb 20, 2013 8:50 pm
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