Spare inner tube

[Nerdy Norm]

A quick question for the experts

I know that normally you have to use inner tubes with different valve angles on the front and back wheel. I'm just sorting out getting a spare wheel, and it occurred to me that I don't know which angle valve to use for the spare, bearing in mind it needs to be able to fit on both the front and back of my LI Series 3.

Any help appreciated!

[Donnie]

Personally my spare has the angle for the front, ie 45 degree not 90. that way it can go on either and simply sort out the puncture when i get home and swap back, but if you use the 90 degree as a spare and you get a front puncture you could be setting yourself up for a blowout farther up the road.

[Nerdy Norm]

Thanks. So it sounds like I need a 45 degree valve.

Which of course begs the question, "why don't we always fit the 45 degree valve tube on both the front and back wheels?".

And why do many people sell a "special Lambretta" tube with a 90 degree angle and a 30 degree offset?

[Doom Patrol]

I think most people do fit tubes with 45 degree angles these days. A sort of one size fits all. I don't know how the different angles came about originally. It's probably an historical thing.

[lambro]

Personally my spare has the angle for the front, ie 45 degree not 90. that way it can go on either and simply sort out the puncture when i get home and swap back, but if you use the 90 degree as a spare and you get a front puncture you could be setting yourself up for a blowout farther up the road.

+1 for me,


45 degree on the rear means the valve bit is too close to the hub to inflate properly.

Same type of question goes with uni-directional tyres, spare on what rotation??
I always fit spare with rear rotation fitment as most punctures happen on the rear.

Shaun.

[speedy]

Errrm this is interesting. I have heard of having different angled valves before because of valves catching on the front. I use 90 deg valves all round on me Lammy and 45 deg angles on me P2. I don't have hydraulics on me front, just a reverse pull drum and standard type dampers. However I did have a 45 deg valve on the rear and found it rubbed against the rear hub. Is it just me that's had this issue,cheers,Speedy.

[Muppet]

pm sent

[vegansydney]

Just fit a Scootopia inner tube they are designed especially for Lambrettas, fit front or rear and the valve is offset for lambretta rims (unlike many others!).

[diesel]

Same type of question goes with uni-directional tyres, spare on what rotation??
I always fit spare with rear rotation fitment as most punctures happen on the rear.

Shaun.

Do What Now?

[lambro]

Same type of question goes with uni-directional tyres, spare on what rotation??
I always fit spare with rear rotation fitment as most punctures happen on the rear.

Shaun.

Do What Now?

On some tyres,
Conti twists, and Mich city Grips etc,
They have dual markings, same tyre, same tread but fitted reversed on either end.

If you fit to the front it goes one way, fit to the rear, its goes the other.

I always fit spares in the rear rotational fitment.

Simples