welcome back to the videos welcome to another beautiful morning in the northeast
today i've had a stupid idea
toasty well overdressed now i used to race and train with a guy called tim grandshaw tim used
to race for the us national team so he knows this and every winter he'd ride his bike with a tire
inside his tire and he would never get any punches so i thought i would test this method out today
i've got a tyre and another tyre and we're going to put them inside each
other and see if it works well i know it works because i've seen it but how easy
is it to do and what will it feel like to ride is this a stupid idea
i messaged him just to make sure i got the details right and he said i did use 21 millimeter tubulars
stuffed inside 30 mil road clinchers it was a huge pain and they were as slow as molasses i
think that's american for treacle so this is going to be either a great win or a complete failure
i have a 30 mil hutchinson fusion clincher here and a 21 millimeter tubular which is the smallest
tub i could find the idea is that this acts as the inner tube and this is just like a normal clincher
on the outside and then you will never ever get punches now usually hutchinson fusion fit these
parkour wheels really well it's a good it's a good combination and the tyre you can get on and
off without tire levers which is promising uh but usually you put a normal inner tube in or nothing
instead of the tub so that's half one how loose that feels there should be space for the tub oh
no is this gonna work the tub does feel small like in a tube size helps that these are really
wide rims as well make sure it doesn't like spin around or anything because i think it needs to be
fitted basically perfectly ah the battles come out need a valve extender if it's harder than a
bike ride oh see unlike an inner tube you've got to like stretch your tub onto a wheel it's kind of
working against that and then another bit comes off on the other side when you don't want it to
so close to working
the tub is now fully on the rim now i just need the clincher to get you know over the room this is
so fun this is such a good idea many hours later success i think i've done it i think i've done it
you wouldn't want to be doing that by the side of the road definitely not but all being well
this should mean no punches all being well
the main issue that i see is that this is a tubeless ready wheel set so the tyre kind
of has to seat and the tubular tyre kind of has a limit to how much it expands when
you pump it up so i can put 140 psi in there and it's not going to get that much bigger so
it's not going to make the tyre seat kind of hard to show on film but it is solid
it's filled the tire enough to ride definitely and i can't imagine it's gonna come off or anything
because it was so hard to get on i guess we should test it outside stupid idea
so i've made it about 1k and haven't fallen off yet so i don't really know what to think of this
does it work yes does it feel good no yeah definitely like molasses whatever that is
should we see if it gets the bike shop seal of approval what are you doing
well i burned my hand under the hot water and the kettle thing in there trying to reset my
last mount and that's the coldest thing i've got in the shop oh i could probably get some
ice from the cafe but it's too far involved walking all the way there actually it's a
good idea no health and safety in here i have done something terrible and fantastic you want to see
you're nervous your latest bit of like ebay online late night shopping no no
no no no no this is legit parts a new bike oh it's not a new bike for you
i don't know i don't know what i'm looking for yeah i've ridden it and i didn't
fall off so i think it's safe but i imagine if you ride it really hard around the corner the
tire might come off there's something in there is that a solid no no i've never seen you so confused
this is great just on road bikes you mean so is that oh hold on is that like one of their
small things where you like nope that is a tub inside a clincher actually got two ties
i'm hoping you didn't glue it on this there's not mounted on i can feel it moving on top no it's
barely moving it barely moves at all give it away okay the tyre sizes could be refined more but it
it works it doesn't really it's because no because you've got a bigger tire to be more comfortable
now you put a tub in which is smaller so that external tire like obviously your air volume
is still the same but whatever size top you've got and there's effectively the tyre size that
you've got yeah but it doesn't need to ride nice it just needs to be no punches ever
well it's not going to not puncture because it's just essentially something can still go
through both tyres yeah but it hasn't likely yeah but really not likely it's amazing which
tubs you put in it's like a tt tub you're just talking about basically an inner tube exactly
i nearly phoned you to help me get it on no i persevered and now my hands are very
sore when that external tire moves over the internal tire
if this wasn't a tubeless ready clincher yeah it would sit way more flush and be totally more
reliable yeah probably easily get on as well because the bead will be thinner exactly how
ridiculous is that so for all the viewers out there this is the best way to make your bike
puncture proof stick an 80 quid tub instead of your normal eight bun in a tube no 18 pounds
cheaper than a two millimeter we've the internet he wants to hate it but secretly he loves it well
what do you do genius what do you do if you get a puncture you don't get a puncher ever you can't
i'm gonna get something your phone neutral service how confident are you just like no no no no
what a beautiful day for a bike ride i'm so glad i spent it indoors wrestling with tyres all day
what was the conclusion there on the tub inside a clincher well i've switched back straight away
because it was really really rubbish to ride maybe if you were intent on getting some winter
miles in with almost zero risk of puncturing well something would have to penetrate both the tire on
the outside and the inner tube tire on the inside and uh that's fairly unlikely to happen so i guess
if you were really serious about your winter miles you definitely didn't want any punches
and didn't mind riding really slowly it would be a slog but it's definitely doable
and it definitely works i knew it would i trust him but yeah you like how your bike rides and
you're riding just for fun it probably isn't for you i'll do the stupid things on this youtube
channel so you don't have to next up we better get some solid tires and see what they're like
you