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String
29-06-20, 10:20 AM
Hi all

Attempting to make a final decision on a set of tyres for my build and would be grateful of any input. Originally, I intended to go with Avons but have noticed that Galaxys are being used by more forum members and with good feedback - the price is a big influencer here.

Studying the IVA manual posed these questions:

#) Correct nominal size for the wheel - does this mean the tyre width must be at least the minimum width of the wheel? If so, would seem to be an essential requirement regardless of IVA.
#) Load capacity - does this mean that the weight of a single axle must not exceed the load capacity of both tyres together on that axle?
#) Overall tyre width includes inflated tyre bulge on the car at test, right?
#) V rating = 149mph max.; these are acceptable for IVA?

If anyone is running 15" wheels with Galaxys, could I ask a favour? Please could you measure the size of the tyre bulge (that protrudes out from the wheel rim) at front and rear and let me know what size tyres you are running? I had these measurement for Avons, provided kindly by a generous soul, but with the change to Galaxys I need to be sure - the Dax rear arches with my chosen wheels don't allow for much tyre bulge, without infringing on the IVA wheel guard requirements. I'm considering 215/60/R15 & 245/60/R15

Thanks in advance - there's plenty of variables to keep me busy here. :confused:

Tris

1dayiwill
29-06-20, 10:42 AM
This is really useful.
https://tiresize.com/tyre-size-calculator/

drammyboy
29-06-20, 10:47 AM
These 255x60x15 Coopoer Cobra tyres ( I'm selling ) were just too wide for IVA

so I am going with 235 tyres on the front of my Dax.

The 255 tyres I have are surplus but might suit the rear of your car.

http://img4.imagetitan.com/img4/small/22/22_3831.jpg (http://img4.imagetitan.com/img.php?image=22_3831.jpg)

http://img4.imagetitan.com/img4/small/22/22_4870.jpg (http://img4.imagetitan.com/img.php?image=22_4870.jpg)

http://img4.imagetitan.com/img4/small/22/22_5623.jpg (http://img4.imagetitan.com/img.php?image=22_5623.jpg)


------
I had to make up spats to cover my wide rear 295 tyres

http://img4.imagetitan.com/img4/small/22/22_1wirining088787.jpg (http://img4.imagetitan.com/img.php?image=22_1wirining088787.jpg)

Lloyd Barnes
29-06-20, 11:25 AM
Hi Tris

I have 15" Galaxies on mine. I think broadly similar to the widths you are looking at. I'll go measure them shortly. They do bulge although not as much as the Eagles visually.

Northants told me they designed them as a tyre to suit the GT40 boys who'd got sick of burning up expensive Avons at track days. The idea was to provide a grippy tyre at a sensible price. Decent bunch, well worth going to see them. I've heard pretty decent reviews from people running them on the road (my car is still in build). The only downside for the pedants amongst us is the tread pattern is more modern than the Avon :-)

Julesdm
29-06-20, 11:47 AM
Tris

I have 15" American Racing wheels on my AK. I bought the Galaxy tires as i wanted the white writing. They are the only white writing tires with the correct speed rating. Has to be minimum 130mph capability. DVLA confirmed this to me.They have a standard tire bulge...whatever that is.....i am runing 215 60 15 on the front and 255 60 15 on the rear.
I reckon i have probably 5mm of protrusion out of two wheel arches. The AK body for some reason is not quite true. I have found this product which i am going to stick onto the wheel arches for my IVA. www.easywider.co.uk (http://www.easywider.co.uk) i have tested it on a paint sample for my body and it peeled off no worries. Regards Jules

https://i.imgur.com/qFkPENF.jpg
E=String;598393]Hi all

Attempting to make a final decision on a set of tyres for my build and would be grateful of any input. Originally, I intended to go with Avons but have noticed that Galaxys are being used by more forum members and with good feedback - the price is a big influencer here.

Studying the IVA manual posed these questions:

#) Correct nominal size for the wheel - does this mean the tyre width must be at least the minimum width of the wheel? If so, would seem to be an essential requirement regardless of IVA.
#) Load capacity - does this mean that the weight of a single axle must not exceed the load capacity of both tyres together on that axle?
#) Overall tyre width includes inflated tyre bulge on the car at test, right?
#) V rating = 149mph max.; these are acceptable for IVA?

If anyone is running 15" wheels with Galaxys, could I ask a favour? Please could you measure the size of the tyre bulge (that protrudes out from the wheel rim) at front and rear and let me know what size tyres you are running? I had these measurement for Avons, provided kindly by a generous soul, but with the change to Galaxys I need to be sure - the Dax rear arches with my chosen wheels don't allow for much tyre bulge, without infringing on the IVA wheel guard requirements. I'm considering 215/60/R15 & 245/60/R15

Thanks in advance - there's plenty of variables to keep me busy here. :confused:

Tris[/QUOTE]

Lloyd Barnes
29-06-20, 11:58 AM
Measured with a clamp. I'd say accurate within 2-3mm

215/60/15 - max width = 238mm
245/60/15 - max width = 281mm

38762

KevinW
29-06-20, 12:20 PM
If you want measurements for Galaxy 235 and 255 let me know, as my wheels/tyres are off the car atm.
You can also get useful info on tyre dimensions on the NorthHants Tyres website ee.g.
https://www.northhantstyres.com/classic-tyres/galaxy/235-60-15-GalVR-RWL.html

jon1d
29-06-20, 01:25 PM
The wheel off set is a factor to consider
I have 215 and 235 Galaxy. Both fit in the arch on image 15inch. I could of fitted 245 on the rear which still would be fine but would of increased my gearing as I am using 2.88 diff which is already low geared. Dax body.

String
29-06-20, 02:39 PM
Firstly, thanks for all the responses guys, much appreciated.

1dayiwill - thank you, I checked this out although the widths seem to be as if bought off the shelf i.e. not inflated and under vehicle weight? Unless I'm using the calculator incorrectly i.e. 215/60/R15s come up at 216mm wide, which is the about width of my wheels. It's the tyre bulge that is going to cause issues if too pronounced.

Drammy - thanks. It's for exactly this reason I'm having to be careful on choices - so if I can avoid spats I will. I may have to go as narrow on the rear as 235, so your 255 Coopers will have to find a different home I'm afraid.

Lloyd - awesome, that's just the measurements I needed and gives me something to work with. 215/60/R15s will just work on the front. I need to get the rear driveshafts and hubs back together before I can measure the rears. Given that it's going to a 383 SBC under the bonnet, I'll not worry unduly at the moment about the modern tread pattern too much, but thanks for the info :wink:

Jules - Those spats may be a great solution for the rear arches if I get in a pinch, thank you. Hopefully I can avoid the issue with slightly narrower tyre choices :confused: good luck with your IVA.

Kevin - TBH, if you can find the time to take some measurements it would help because I may need to go with 235s on the rears - it's gonna be close so an accurate measurement would help, thanks. The deets on NHT&W don't seem to include the bulge? I intend to use them for my purchase.

Jon - thanks, that's reassuring as it looks hopeful that it could be a case of "either/ or". 2.88PL diff here too so will bear that in mind.

I painted myself in to a corner as the Chevy block needs another washout and is at the far end of the garage, Cob up on axle stands meaning I can't wheel the block out for cleaning :roll: Will be great to get tyres and wheels on proper. Thanks for everyone's input. (Thumbs up)