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gpage3
Joined: 02 Feb 2018 Posts: 36 City/Region: Pendleton SC
State or Province: SC
C-Dory Year: 2018
C-Dory Model: 23 Venture
Vessel Name: Eressëa
Photos: Eressëa
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Posted: Sun Oct 18, 2020 1:09 pm Post subject: |
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Current trailer is a Float On dual axel with 175r13 tires. I am thinking of getting 15" but that will require all new rims and tires. Also Any clearances need to be con firmed.
I wonder if there is any an advantage to the larger tire to justify the cost. _________________ "Speak friend and enter" |
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hardee
Joined: 30 Oct 2006 Posts: 12632 City/Region: Sequim
State or Province: WA
C-Dory Year: 2005
C-Dory Model: 22 Cruiser
Vessel Name: Sleepy-C
Photos: SleepyC
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Posted: Sun Oct 18, 2020 1:56 pm Post subject: |
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The 15 will rotate fewer times per mile, but will be tighter under the wheel well or fender. It will increase your depth to launch by 1 inch, and raise your step up to the fender to board the boat on the trailer by that same 1 inch.
Things to consider.
Harvey
SleepyC
_________________ Though in our sleep we are not conscious of our activity or surroundings, we should not, in our wakefulness, be unconscious of our sleep. |
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thataway
Joined: 02 Nov 2003 Posts: 20808 City/Region: Pensacola
State or Province: FL
C-Dory Year: 2007
C-Dory Model: 25 Cruiser
Vessel Name: thataway
Photos: Thataway
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Posted: Sun Oct 18, 2020 4:56 pm Post subject: |
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Quote: | It will increase your depth to launch by 1 inch, and raise your step up to the fender to board the boat on the trailer by that same 1 inch.
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It may not be quite that simple: Lets look at two trailer tire sizes: The 175/80x 13 and a 205/80x15.
The outside diameters are: 24 vs 27.9 inches. respectively, So the radius (which is what determines the distance the boat is off the water) increased by almost 2" Just the rim diameter (the 13 or 15) is not the only determining factor. The height of the side wall will also increase almost an inch with the larger tire. _________________ Bob Austin
Thataway
Thataway (Ex Seaweed) 2007 25 C Dory May 2018 to Oct. 2021
Thisaway 2006 22' CDory November 2011 to May 2018
Caracal 18 140 Suzuki 2007 to present
Thataway TomCat 255 150 Suzukis June 2006 thru August 2011
C Pelican; 1992, 22 Cruiser, 2002 thru 2006
Frequent Sea; 2003 C D 25, 2007 thru 2009
KA6PKB
Home port: Pensacola FL |
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gulfcoast john
Joined: 14 Dec 2012 Posts: 989 City/Region: PENSACOLA
State or Province: FL
C-Dory Year: 2010
C-Dory Model: 255 Tomcat
Vessel Name: Cat O' Mine
Photos: CAT O' MINE
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Posted: Sun Oct 18, 2020 5:51 pm Post subject: |
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Gary,
Check your trailers capacity plate. If you only have the serial number, Float-On can give you the numbers.
As long as the trailer is not overloaded based on a truck scale weight, tires larger than needed have those disadvantages as above. Tongue weight should be about 7-10% (not 15% like RV’s). If you don’t have swaying or fishtailing at speed or when being passed, it’s likely OK. If not, measure it. You want the transom to be supported, not hanging off the end of bunk. If it is, you can move the winch stand forward a bit, but this will increase the tongue weight.
Colby has had amazing performance with those Carlisle tires. I had a set that all delaminated (including the unused spare) at 13 months and 2,000 miles, no warranty. Two cases of N of 1. My R-16 Endurance tires out of the shop with tax and balancing were about $180 each. In 15 years of towing the Regal 2665 and TC 255 boat rigs over 11,000 lbs on Chinese tires, we’ve had 6 scary explosive blowouts in the six-lane portions of I-10 @ 60 MPH not counting routine flats. None since switching. It’s an individual decision.
Hope this is helpful.
Happy towing!
John _________________ John and Eileen Highsmith
2010 Tom Cat 255, Cat O' Mine
Yamaha F150, LXF150 |
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journey on
Joined: 03 Mar 2005 Posts: 3595 City/Region: Valley Centre
State or Province: CA
C-Dory Year: 2005
C-Dory Model: 25 Cruiser
Vessel Name: journey on
Photos: Journey On
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Posted: Sun Oct 18, 2020 10:19 pm Post subject: |
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I had a sailboat on a trailer. I put 15" wheels and the corresponding tyre in order to prevent blowouts and have more weight margin.
It was a bad idea. The ride was a lot rougher, though the increased height didn't bother me. The ride was so much rougher that I went back to the 14" wheels/tyres. The side walls on the 15" were a lot stiffer to carry more weight. The trailer and boat would really shake going down the freeway. Fortunately it was a single axle trailer so I only wasted 2 wheels and 2 tyres.
Boris |
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hardee
Joined: 30 Oct 2006 Posts: 12632 City/Region: Sequim
State or Province: WA
C-Dory Year: 2005
C-Dory Model: 22 Cruiser
Vessel Name: Sleepy-C
Photos: SleepyC
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Posted: Sun Oct 18, 2020 10:42 pm Post subject: |
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Boris, the single axel trailer would also contribute to the rougher ride. I agree, there is a point where the tires size relates to increased side wall stiffness and that will be noticed by the boat. Tandem axle will dampen that bump by about half though.
Harvey
SleepyC
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gpage3
Joined: 02 Feb 2018 Posts: 36 City/Region: Pendleton SC
State or Province: SC
C-Dory Year: 2018
C-Dory Model: 23 Venture
Vessel Name: Eressëa
Photos: Eressëa
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Posted: Fri Oct 23, 2020 10:24 am Post subject: |
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Great information, thanks |
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