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Does Low Tyre Pressure = Increased Punctures? | Ask GCN Anything Cycling

Does Low Tyre Pressure = Increased Punctures? | Ask GCN Anything Cycling


(upbeat music) – Coming up on this week’s Ask GCN, how to descend in high winds, what is the best bike for indoor training, does a lower tyre pressure
mean more punctures, and what are those small springy
things in quick releases, plus a lot more too. – That’s a really good question. Can learn a lot from that one. But first up is this
from Hornetluca who asked how much does heat affect
performance during cycling? – Well that’s an interesting one and very difficult to quantify, isn’t it? Because different riders
will respond to extreme heat in a different way. The likelihood is that if you’ve grown up in a very hot country, you are better able to
deal with high heats than if you’ve grown up in a cold country. But everybody will be
effected to some degree. And that is due to the
body’s own mechanisms to cope with the heat almost like a defence mechanism really. So once your cold body temperature rises to a particular point your body will prevent
you from working too hard so that you don’t do
yourself any serious damage. – Yeah, but there a few
things you can actually do to help your body when
exercising in the heat. The first one, obviously one of course, is make sure that you’re properly hydrated and the second one is
acclimatising to the heat itself. And this is something I’ve
actually done in the past, way back in the late ’90s. I trained for particularly hot and humid Commonwealth Games Road
Race over in Malaysia. What I actually did was train in my garage on my home trainer with a
tumble dryer full of wet towels. And it actually worked for me, and you see pros doing
similar things now as well, especially when you look
at the kind of climates they have to perform in. Let’s take the Qatar World Championships, last year for example. – Yeah, or even the Rio de
Janeiro Olympics in 2016 too. There’s a lot more
things you can do though to help yourself if you
are riding in extreme heat. And we went through a few
of those tips in this video. – It was warm there, wasn’t it? – It was hot, yeah. (upbeat music) The first rule is to make
sure that you drink plenty. Sweating is your body’s very effective way of cooling yourself. But what it does mean
is that you need to stay on top of your hydration stages so that you’re replacing the
water that you’re loosing through sweating. – Yeah remember that more
than 50% of your body is made up of water. So it’s really important that you keep that level maintained. Make sure you’re hydrated
before you even head out and then take plenty
of fluids out with you. You really want two big bottles, 750 mls. And ideally you want to
favourite electrolyte drinks over water, as they do a much better job of keeping you hydrated. – Our next question came in on Twitter using the important hashtag
#torqueback from Dave Lambert. Any tips on descending in heavy wind, over 60 kilometres per hour? I’m riding in Tenerife,
which has beautiful descends but the heavy wind is very scary. – You’re right, riding
in heavy winds like that is pretty scary. But it’s not too bad when you’ve got a tailwind
directly behind you. A headwind is pretty safe as well, although that can be pretty annoying. But once the wind comes from the side, especially when you’re
travelling at high speed it can make things
pretty choppy on the bike and the wind can really affect
the steering of your bike. – Yeah, our first piece of
advice for this situation would be just to be cautious. There’s no prizes really if
you’re going faster on descends when you’re not competing. So don’t be afraid of just
putting your brakes on and going slower. The next one though is equipment, in particular your wheels, and
especially your front wheel. So a traditional shallow
section, box section rim is going to catch the wind far less when it’s coming from the
side than a deep dish wheel. And once again, the fact
that the shallower rims are less narrow is not really going to be of any importance when
you’re not competing. – In fact, we’ve got a few tips on riding crosswinds in this next video. The most efficient place to
ride is right in the gutter. Staying out of the pace line but still being sheltered from it. It’s a difficult place to stay, but it’s a skill well worth mastering. – And with this in mind, and if you want to make
somebody really suffer, you don’t want to offer
them any protection at all. And by putting Simon right in the gutter he’s getting hardly any
benefit from my slip frame. And if, and it’s a very big if, I’m stronger than him I
should actually drop him, something I couldn’t do without
the help of a crosswind. It’s time for the rapid fire round now. And shall we try and be quick this week? – Super quick, let’s do this. – Okay, first up from Tracy. Tracy, Tracy, Tracy from Switzer.
– Three Tracys. – What are the pros and
cons of getting a spin bike versus a regular bike
trainer for home use? Well if you’re talking
about specific spin bikes they’ve got quite a different feel in terms of the way that you pedal and the type of resistance they use. You can get other study bike, such as a walk bike, which
give a very road like feeling. And the advantage of having something like that in your house
is it’s always there set up for you to use as and when you want to
do some indoor training. The cons to that might be that it takes up a little bit
more room in your house and also it can be quite difficult to get exactly the same position as the bike that you’re
using out on the road. – Good answer Dan, but not exactly rapid
is my view on that one. Next up we have this from Ed Newell. Hashtag #torqueback. Years ago I was told to
keep tyre pressure high to prevent punctures from sharp objects. Softer tyres puncture easily,
true or false, or TOF, as you’ve written down. Took me a while to work at what that was. But basically, the risk
of getting pinch puncture are actually higher if you
have a lower tyre pressure. Ubt now a days, because tyres are getting increasingly wider and frames being built to accommodate them, the actual risk is decreased
because it just brings– – Air within the tyre. – Indeed. So as in relation to getting flints and bits of glass in your tyre, that can be something
to do with the casing and it’s just about luck as well I think. – Yeah, penetration of a sharp object I don’t think has anything to do with tyre pressure whatsoever. That is the casing itself. Next up Renee Starling on Twitter, I have a cross bike
for commutes and trails but would a separate
endurance bike be better for riding in a sportive? Not necessarily Renee. If you’re very comfortable
with the position of your cross bike and you want to go and do a sportive we recommend just
purchasing some slick tyres, so that you’ve got slightly less roll and resistance on the road and you’re probably then going to be fine. You might at a point
find that the gear ratios aren’t quite what you need on
the road versus off the road, but again that can be changed
with different cassettes on a different set of wheels, which you can use on
your cyclo-cross bike. So if you’re comfortable it’s fine. – 8 out a 10 per speed there
Dan, but very succinct. Ah, next up and finally
in the rapid fire round, – Not quite. – Is Peter Sagan, that’s the penultimate
question, thank you very much. It’s from Peter Sagan. Thanks very much for getting in touch Peter.
– I don’t think it’s the real one, but it might be. – Yeah, I mean, it’s written down. Anyway, here we go. Can Froome be just as fast
on an entry level bike compared to a fit average
climber on a high end bike? No, it wouldn’t be as
fast, it’d be faster. Now that’s the rapid answer. – It is yeah. It’s about the rider as much as the bike. Way more than that.
– Definitely. – The bikes will make
a bit of a difference but you put Froome on a 1,000 pound bike, or even less,
– He’s gone. He’s going to everybody super fast. – That would be rapid fire. – Anders Skansen has written in underneath one of our last Ask GCN anything’s. I’ve been wondering lately, what exactly do those little springs on the skewer do, and why are they cone shaped? – That’s a cracking little
question there, isn’t it? – Yeah, well it’s basically
to keep either side of the quick release equidistant
from the axle on the hub, which makes getting your wheel in and out both at the front and back far easier. The reason that they are cone shaped is so that they don’t
go over the axle part which goes into your fork legs
or into the rear dropouts. – Basically balancing
the width of your skewer. – Our next question is
affectively about recovery, it came in from Andy. I missed my morning ride. Can I take a seven PM ride at night and still be rested
enough for my 5:30 AM ride the following morning? Well once again this is
going to be determined by a number of different factors. Firstly, what you’ve
been doing on the lead up to these two rides in
terms of your training. Secondly, what you’re planning on doing on the actual rides themselves. And even the type of job you’ve got can affect this type of thing. So if you are working in a office and you just sit down, and
at least physically relaxed if not mentally, your recovery
powers might be greater than if you are a manual labourer. – Yeah, I think what you need to ensure is that after, if you choose
to ride in the evening, after the ride, you make
sure you eat properly, then get some rest that’s very, very important indeed. And also you really do need to factor in your level of fitness. So say for example you do
four or five rides a week, you may find that you can cope perfectly adequately with
those back to back sessions. But if you trained just
a couple of times a week at low intensity, you might actually find
that doing those sessions within such close proximity
may give you pretty sore legs. But I think overall
what you need to ensure, and what you need to
integrate into training is a degree of flexibility. Especially if you’re working
around a full time job. And there’s no harm from sounding a bit of extra rest or having close together sessions basically. – Hm, and if you want to
improve your recovery time we’ve got a few tips for
that in this next video. Why, look at the smoothie. – Look at that t-shirt my mate. – Look at that face. Young. (upbeat music) – First and foremost, recovery happens when we’re resting. So, we should aim to do just that. However, most of us lead hectic lives and so we probably don’t have the luxury of being able to collapse on the sofa after a hard ride. Although, that is probably something we should all aim for at least. – Yeah, I definitely
aim for that most days. You should particularly think about the timing of your
training sessions as well. So if you’re someone with
a very busy and hectic job, it’s pretty best not to do your training sessions before work. Instead, do them after work that way when you get home you can relax before going to bed. – Yeah, because bed, or
more accurately sleep, is even more important to your recovery than you might think. Even power naps have an
incredibly beneficial effect on your recovery. – I’m not sure that now is the best time for a power nap, Si. Maybe wait ’til you get home. – And finally on this weeks Ask GCN we have this question from Bikeanddogtrips over on Twitter, who asked, why is it deemed so important
to improve your FTP, your functional threshold power? I would’ve thought it
more useful to improve your VO2 max threshold. – Well to a degree the two
are linked, aren’t they? I mean your VO2 max is important, but you’re not going to have a
power at VO2 max at 500 watts if your FTP is only 150 watts for example. So FTP is kind of the
basis for fitness really, in terms of endurance, road wise. On top of what you can
put the icing on the cake with your shorter sharper efforts. At the end of the other
end of the scale though you’ve got track sprinters and BMXs for whom FTP is not
really important at all, because often their events
are less than a minute long. – Yeah it is a really
interesting subject though, because let’s take Mark
Cavendish for example. Now his FTP compared to a
lot of his contemporaries in the Pro Peloton
isn’t particularly high, yet he is one of the most
successful riders of all time. – Yeah. – And if you compared his
FTP to a member of the public obviously it’d be way higher, so it is,
– It’s all relative, isn’t it? – It is all relative. And in fact, we discussed
this very topic, didn’t we, in a video that we
filmed over in The Yorker about how important is FTP to pro cyclist? And finally we have, the punchers. The likes of Philippe Gilbert
and Greg Van Avermaet. Now those guys might not necessarily be out to sprint with the best sprinters, time trial with the best time trialists, or climb with the purest of climbers, but what they do have
is a superhuman ability to deliver power on short climbs. – Yeah these beasts have
the biggest disconnects between their functional threshold powers ad the power that they’re able to produce over short climbs of maybe one
to five minutes in duration. They are anaerobic monsters. Not only have they got an amazing ability to go in to the red they can do it on most heat of occasions over the course of a single race. And this in fact, is kind of what made the Olympic road race in 2016 so fascinating. ‘Cause really Greg Van Avermaet on paper should not have been able to win that race with the climbs involved. However, on the fold of his life he was able to dig deep, go in to the red, stay with some of the best
climbers in the world, and then easily out
sprint them at the end. – Well that’s it for this week’s Ask GCN. And don’t forget you
can leave your questions for future shows in the
comment section down below. Or if you happen to think of something whilst you’re out and about and you want to use
social media, you can use the hashtag #torqueback
– A phone. – And we will find it there. Don’t forget to subscribe to the channel, there will be a globe somewhere
on the screen right now, you just have to click on
that to subscribe to GCN. And we got a couple more relevant videos for you now.
– We have. – Just down here is Si’s first look at Mavic’s very revolutionary
new tubeless tyre set up. – And to keep it rubber related, how ’bout clicking just down here for the truth about wider tyres. – Down where? – Just down there. – You’re on it today, aren’t you?

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