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Spare wheel sanity check

V

Van Fisher

Our Eriba has lovely shiny alloy wheels, but no spare. I'm not a fan of the squirt in gunky stuff. The tyres on the alloys are 185R14C. I have found a second hand steel caravan wheel with a 175R14C tyre, so 10mm narrower, but still wider than a space saver.
The PCD is the same and the centre hub hole on the spare is 68mm as opposed to 60mm on the alloys.
Can you see any problem with carrying that as a spare?

Next question, jacking. I am thinking bottle jack with an Alca 430810 Jack Support Plate to cradle the chassis. Link below if you have not heard of it. Any problems with that?

​

Thank you in anticipation.
 
The support plate will not do. That will only help to position the jack. First, the chassis needs to be reinforced at the jacking point to stop it twisting. But you can jack directly under the axle, but difficult to access.

Yes, in my opinion, it should be strong enough to jack when delivered.

Here are two options.

ONE TWO

But shop around for value.

John
 
Some hub designs use the centre hole to centre the wheel before tightening the wheel bolts - if this is the case, a 68mm hole is too big - and the tyre would need changing for a 185R14C and the 175R14C would be a smaller rolling radius giving uneven braking.
 
Jcloughie said:
The support plate will not do. That will only help to position the jack. First, the chassis needs to be reinforced at the jacking point to stop it twisting. But you can jack directly under the axle, but difficult to access.

Yes, in my opinion, it should be strong enough to jack when delivered.

Here are two options.

ONE TWO

But shop around for value.

John
Click to expand...
Thanks John, what about this?

https://www.ebay.co.uk/itm/225435769666?_trkparms=itmf%3D1%26aid%3D1110006%26rkt%3D4%26asc%3D305797,303807,306634%26mech%3D1%26algv%3DSimVIDwebV4WithCtxRankerV1UnifiedFeaturesWithAuctionUnificationKatReco%26pmt%3D1%26amclksrc%3DITM%26sd%3D274725698906%26sid%3DAQALAAAAEBYz3wswq%2BnvU%2FI64GlxVO0%3D%26itm%3D225435769666%26noa%3D0%26plcampt%3D0%3A15852419014%26algo%3DHOMESPLICE.SIM%26ao%3D1%26rk%3D4%26pid%3D101875%26b%3D1%26mehot%3Dnone%26lsid%3D3%26meid%3D2876cd8af8d74bc1bb4feb21f9f82036%26pg%3D2332490&_trksid=p2332490.c101875.m1851&itmprp=cksum%3A2254357696662876cd8af8d74bc1bb4feb21f9f82036%7Cenc%3AAQALAAABMNcuE5wSiaWXUpZtpAuJty4GYCq%252BLEH%252FN8HXnEhWX0xwkDW1uDN51f72s7GsFOUQ9WFGrCI8AiSbyE6tacE%252FxpPzcbI6%252Bfuy9WmqzFcws0Mbs2rUINFxZuN6RvoCe4DpKr0OPE2Wr8a30DX1%252BEz2e6QQd8nQlqzpX2beP6R8DC29H17NjQFc0Y47osZfVx8Vg8NXWEF8kelyGzugmRbBN8pNAH2ihN4Mwy9Pks5%252B8wMX1XjhOq80F5n16qaEqabBE%252FD9jbli8pyKo2Dph36IKQKY2r%252B9hqUrBEmqb2dKLyTCRbZqUg9uVia9CleWXAMXPUpbQGtRcpteAxxJn%252F3gSQnc9NHqweJDliRlAleRtTj6mk4Ge0i4b%252ByxmfSLtR%252BblwHRlH6fCPRsYeta1TXdN4s%253D%7Campid%3APL_CLK%7Cclp%3A2332490&itmmeta=01KRB6Z48MT73Q2M7GZ5Q8PXPN
 
RogerL said:
Some hub designs use the centre hole to centre the wheel before tightening the wheel bolts - if this is the case, a 68mm hole is too big - and the tyre would need changing for a 185R14C and the 175R14C would be a smaller rolling radius giving uneven braking.
Click to expand...
Good points, thanks Roger.
 
A bottle jack has a certain height when at its lowest point, and that can very often be greater than distance between the road surface and whatever jacking point you wish to use when the tyre you wish to change is flat.
Measure the height of your (inflated) tyres side wall and subtract that from the measurement of the clearance from the road surface to whatever point you intend to jack on when the tyre is inflated.
Then compare that measurement to the height of your bottle jack to see if it will fit when the tyre is flat. (It probably wont)
 
On further inspection, I cannot see any holes in the chassis to fit the strengthening brackets. It is all box section, so I guess not an Alko chassis.
 
Mr Plodd said:
A bottle jack has a certain height when at its lowest point, and that can very often be greater than distance between the road surface and whatever jacking point you wish to use when the tyre you wish to change is flat.
Measure the height of your (inflated) tyres side wall and subtract that from the measurement of the clearance from the road surface to whatever point you intend to jack on when the tyre is inflated.
Then compare that measurement to the height of your bottle jack to see if it will fit when the tyre is flat. (It probably wont)
Click to expand...
If that happens just pull the caravan up the levelling ramp that most of us carry, or use a nearby kerb if no ramp available - that will gain the necessary couple of inches
 
Van Fisher said:
Thanks John, what about this?

https://www.ebay.co.uk/itm/225435769666?_trkparms=itmf%3D1%26aid%3D1110006%26rkt%3D4%26asc%3D305797,303807,306634%26mech%3D1%26algv%3DSimVIDwebV4WithCtxRankerV1UnifiedFeaturesWithAuctionUnificationKatReco%26pmt%3D1%26amclksrc%3DITM%26sd%3D274725698906%26sid%3DAQALAAAAEBYz3wswq%2BnvU%2FI64GlxVO0%3D%26itm%3D225435769666%26noa%3D0%26plcampt%3D0%3A15852419014%26algo%3DHOMESPLICE.SIM%26ao%3D1%26rk%3D4%26pid%3D101875%26b%3D1%26mehot%3Dnone%26lsid%3D3%26meid%3D2876cd8af8d74bc1bb4feb21f9f82036%26pg%3D2332490&_trksid=p2332490.c101875.m1851&itmprp=cksum%3A2254357696662876cd8af8d74bc1bb4feb21f9f82036%7Cenc%3AAQALAAABMNcuE5wSiaWXUpZtpAuJty4GYCq%252BLEH%252FN8HXnEhWX0xwkDW1uDN51f72s7GsFOUQ9WFGrCI8AiSbyE6tacE%252FxpPzcbI6%252Bfuy9WmqzFcws0Mbs2rUINFxZuN6RvoCe4DpKr0OPE2Wr8a30DX1%252BEz2e6QQd8nQlqzpX2beP6R8DC29H17NjQFc0Y47osZfVx8Vg8NXWEF8kelyGzugmRbBN8pNAH2ihN4Mwy9Pks5%252B8wMX1XjhOq80F5n16qaEqabBE%252FD9jbli8pyKo2Dph36IKQKY2r%252B9hqUrBEmqb2dKLyTCRbZqUg9uVia9CleWXAMXPUpbQGtRcpteAxxJn%252F3gSQnc9NHqweJDliRlAleRtTj6mk4Ge0i4b%252ByxmfSLtR%252BblwHRlH6fCPRsYeta1TXdN4s%253D%7Campid%3APL_CLK%7Cclp%3A2332490&itmmeta=01KRB6Z48MT73Q2M7GZ5Q8PXPN
Click to expand...

It will be Okay, but if it is now thought to be a non Alko chassis. A re-think is needed.

John

PS, I just re-read you first post and see you have an Eriba. I know nothing about them I am afraid. Perhaps look for an Eriba forum.

John
 
On further research, I have found an official pdf manual from 2012 on line. It says to use a scissor jack under the axle. I dont know if the manual still applies to my 2018 model, and have emailed Hymer in Germany requesting conformation or a link to the appropriate manual.
 
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