Them self sealing inner tubes?

General cycling advice ( NOT technical ! )
WrightsW5
Posts: 794
Joined: 1 Jun 2010, 10:37pm
Location: Saddle City

Them self sealing inner tubes?

Postby WrightsW5 » 19 Dec 2014, 1:03am

I have seen them in Halfords, own brand and Slime brand. Both say they seal punctures up to 3mm. Are they any good, do they really work?

User avatar
[XAP]Bob
Posts: 16971
Joined: 26 Sep 2008, 4:12pm

Re: Them self sealing inner tubes?

Postby [XAP]Bob » 19 Dec 2014, 6:12am

i last used slime tyres over a decade ago, rode over a pile of drawing pins and yes the slime worked really well.

How often do you get small penetration punctures?
A shortcut has to be a challenge, otherwise it would just be the way. No situation is so dire that panic cannot make it worse.
There are two kinds of people in this world: those can extrapolate from incomplete data.

Elizabethsdad
Posts: 1158
Joined: 15 Jan 2011, 7:09pm

Re: Them self sealing inner tubes?

Postby Elizabethsdad » 19 Dec 2014, 9:11am

I had Slime inner tubes on a bike a few years back - combined with Marathon plus tyres - never had to fix a puncture but don't know if I got any. I did notice that I had to pump up the tyres less frequently which made me wonder if the slime has the effect of making the inner tube less permeable.

WrightsW5
Posts: 794
Joined: 1 Jun 2010, 10:37pm
Location: Saddle City

Re: Them self sealing inner tubes?

Postby WrightsW5 » 19 Dec 2014, 10:32am

I seem to get a lot of tiny punchures where I can pump the tyre up every day or half day and ride around, then if I go to the effort of fixing one I seem to get another very soon!!!! So these self repairing ones sound like a good idea.

John_S
Posts: 329
Joined: 16 Sep 2014, 10:34pm

Re: Them self sealing inner tubes?

Postby John_S » 19 Dec 2014, 11:08am

I’ve not used the slime before but was interested in reading peoples thoughts because the thought of getting less punctures is always appealing.

Following the post from Elizabethsdad I took a look at the Schwalbe Marathon Plus tyres. The video that is on the Schwalbe website is definitely interesting in terms of the tyres preventing punctures.

http://www.schwalbe.com/gb/tour-reader/marathon-plus.html

http://www.schwalbe.com/en/unplattbar.html

However I guess that there would be a weight and rolling penalty to pay for the reduced chance of punctures.

User avatar
Si
Moderator
Posts: 15035
Joined: 5 Jan 2007, 7:37pm

Re: Them self sealing inner tubes?

Postby Si » 19 Dec 2014, 11:11am

My experience of putting it into a pair of tyres that got frequent p*nct*res on the local gravel and glass cycle paths is that once in there I didn't have another p*nct*re.

However, this was a case of putting slime into my tubes rather than buying tubes with it already in. Hopefully if you buy tubes with it already in then you won't won't end up 'gunking' yourself and everything around you when you try to put it in (as the applicator was built for car-type valves but I had presta so some fabrication was needed), or when you try to top up the tyres (did get a bit coming back out when I undid the barrels and pressed to free the valve up).

Elizabethsdad
Posts: 1158
Joined: 15 Jan 2011, 7:09pm

Re: Them self sealing inner tubes?

Postby Elizabethsdad » 19 Dec 2014, 11:26am

John_S wrote:I’ve not used the slime before but was interested in reading peoples thoughts because the thought of getting less punctures is always appealing.

Following the post from Elizabethsdad I took a look at the Schwalbe Marathon Plus tyres. The video that is on the Schwalbe website is definitely interesting in terms of the tyres preventing punctures.

http://www.schwalbe.com/gb/tour-reader/marathon-plus.html

http://www.schwalbe.com/en/unplattbar.html

However I guess that there would be a weight and rolling penalty to pay for the reduced chance of punctures.

Other people have reported that Marathon plus has a greater rolling resistance, I didn't notice a problem myself but maybe I am not that fussy. They do seem to be generally regarded as about the best for puncture prevention, so if that is your priority... With regard to slime tubes I recall reading in other posts that when it came time to replace the tyre the slime inner tube had to be replaced as well as it would be glued to tyre where ever it had sealed a puncture. Also according to one cycle mechanic I was chatting to once have one blow out on you when you are pumping it up is a messy experience to be avoided.

Phil Fouracre
Posts: 808
Joined: 12 Jan 2013, 12:16pm
Location: Deepest Somerset

Re: Them self sealing inner tubes?

Postby Phil Fouracre » 19 Dec 2014, 12:37pm

Best thing 'since sliced bread'! Got slime in all my bikes, marvellous stuff. On one, got slime and marathon plus tyres, bullet proof. Having a blow out being messy, sounds like a myth to me, why would they in particular, blow out? Just out of interest, I changed tyres from those supplied, on one of my bikes a while ago, for marathon plus, because the originals didn't look much of it. While I had the tube out I checked it over and found a number of pin head sized brown spots on it. As you would, I picked a couple of them off to find green underneath! Confirmed what I had always felt, that it really did the job, had no noticeable pressure drop, yet had obviously had punctures!
Never attribute to malice that which is adequately explained by stupidity

User avatar
[XAP]Bob
Posts: 16971
Joined: 26 Sep 2008, 4:12pm

Re: Them self sealing inner tubes?

Postby [XAP]Bob » 19 Dec 2014, 1:16pm

They don't necessarily blow out more often, but when they do (and it only takes a tube failure, or a slashing puncture) it is a terrible mess...
A shortcut has to be a challenge, otherwise it would just be the way. No situation is so dire that panic cannot make it worse.
There are two kinds of people in this world: those can extrapolate from incomplete data.

User avatar
RickH
Posts: 4564
Joined: 5 Mar 2012, 6:39pm
Location: Horwich, Lancs.

Re: Them self sealing inner tubes?

Postby RickH » 19 Dec 2014, 6:01pm

My only direct experience was a lass I was doing LEJOG with. You could tell she had slime tubes by the arc of green gunk spraying all over the road & bike when she had a puncture a couple of days in.

Most of the others with slime-less tubes didn't have any punctures.

Rick.

sreten
Posts: 347
Joined: 29 Sep 2013, 10:59pm

Re: Them self sealing inner tubes?

Postby sreten » 19 Dec 2014, 10:47pm

Hi,

A good question is how long is it before the slime solidifies, which it will ....

rgds, sreten.

mercalia
Posts: 11669
Joined: 22 Sep 2013, 10:03pm
Location: london South

Re: Them self sealing inner tubes?

Postby mercalia » 20 Dec 2014, 12:22am

An alternative is tyre liners that Halfords also stock. These are strips of hard to penetrate flexible plastic. I have these on my bike and get very few punctures. The only puncture I have had recently was a pinch puncture going over a curb at an angle rather badly. The nice thing just use normal tubes and if you dont like them you can remove them.I havent found any bad effects re rolling quality . The only time I tried slime was fill your self and a) the valve blocked b) the slime collected in one place c) when I got a puncture the goo kept coming out and I couldnt mend the puncture using a patch as the slime got in the way. I wonder how safe it is, cars/mc have had puncture repair aerosols for years, they are meant to be just temp and are at much lower pressure.

User avatar
mjr
Posts: 14161
Joined: 20 Jun 2011, 7:06pm
Location: Norfolk or Somerset, mostly
Contact:

Re: Them self sealing inner tubes?

Postby mjr » 20 Dec 2014, 7:42pm

Cycles have had puncture repair aerosols for years, too. I carry one for use as a quick fix if I puncture on my way to a timed appointment. It's not as good as a patch but it'll get me there.

I think puncture resistant tyres are masses better than the liners of 2005, so I've not tried any more recent versions.
MJR, mostly pedalling 3-speed roadsters. KL+West Norfolk BUG incl social easy rides http://www.klwnbug.co.uk
All the above is CC-By-SA and no other implied copyright license to Cycle magazine.

mercalia
Posts: 11669
Joined: 22 Sep 2013, 10:03pm
Location: london South

Re: Them self sealing inner tubes?

Postby mercalia » 20 Dec 2014, 8:43pm

mjr wrote:
I think puncture resistant tyres are masses better than the liners of 2005, so I've not tried any more recent versions.


take a look next time u visit Halfords. My original( Halfords) ones from, 2000 or so much softer than the ones I got a few months ago from Halfords. Would take a serious sharp object to get through them I think. They fit nicely under the tyres and unlike slime tubes dont need changing if you change the tube? The edges are much thinner so "merge" into the tyre

sreten
Posts: 347
Joined: 29 Sep 2013, 10:59pm

Re: Them self sealing inner tubes?

Postby sreten » 22 Dec 2014, 3:26am

hi,

Tyre liners are a waste of time with puncture protected tyres,
which basically incorporate tyre liners, far more effectively.

PPT's IMO are the way to go.

rgds, sreten.