 REALLY Big front tire
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Joined: May 2009
Posts: 96
Member
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OP
Member
Joined: May 2009
Posts: 96 |
So I did some research on putting a big fatty on the front of my bike and I was hoping to get some feedback from you all.
I was looking to run a 150/70-18 front tire on the bike. I know this would involve removing the fender/fork brace and running dual/split brake lines.
This being said, the side clearance would be 5/8" (stock is 3/4") total before being squeezed into the 2.5" rim. So I feel pretty good about the clearance.
The guy at the dealership give me the thumbs up, but what do you all think?
I know it will affect the stability a bit without the brace, but I really like the look of those big fat tires up front.
'04 Speedy. Emgo 19" turn-outs, Polaris bellmouth, 142/45 Thrux needles, 3.5 turns. Pod filters My Bike
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Re: REALLY Big front tire
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Joined: Aug 2007
Posts: 10,730 Likes: 6
Should be Riding
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Should be Riding
Joined: Aug 2007
Posts: 10,730 Likes: 6 |
I like the big fatties up front too, just like the Exile bikes. If you can make it work, and you like it, go for it! Post pics when its done. Don't worry about the brace in there, the axle and the lower yoke are plenty of support for the forks.
Always remember to be yourself. Unless you suck. Then pretend to be someone else.
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Re: REALLY Big front tire
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Joined: Jan 2005
Posts: 1,823
Learned Hand
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Learned Hand
Joined: Jan 2005
Posts: 1,823 |
this is not safe you need a wider rim for that tire... Ed 
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Re: REALLY Big front tire
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Joined: Jan 2005
Posts: 2,362
Oil Expert
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Oil Expert
Joined: Jan 2005
Posts: 2,362 |
Biker's right... you'll get a lot of sidewall flex from a tyre that fat in a narrow rim. Add that to the added flex in your forks from the loss of the brace and you're asking for problems. Get yourself some spoked wheels from an america, do the thunderbird hub trick so you still have your dual disks, and put a wider rim on the front. Extend the fork brace so it'll fit over your tyre too, and you'll have a nice safe ride with fat looks.
If you're gonna do it, do it right.
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Re: REALLY Big front tire
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Joined: Mar 2009
Posts: 12,964
Stickman Yogi
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Stickman Yogi
Joined: Mar 2009
Posts: 12,964 |
Quote:
If you're gonna do it, do it right.
YEAH!! 
Live to love, love to live.
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Re: REALLY Big front tire
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Joined: Aug 2007
Posts: 10,730 Likes: 6
Should be Riding
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Should be Riding
Joined: Aug 2007
Posts: 10,730 Likes: 6 |
I guess I was assuming you would run a different wheel with a tire that fat. The stock wheel is not wide enough for a tire that size. I still say the fender bracket (it's not really a brace at all) can go.
Always remember to be yourself. Unless you suck. Then pretend to be someone else.
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Re: REALLY Big front tire
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Joined: Sep 2005
Posts: 3,816
Freelance Jedi Knight
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Freelance Jedi Knight
Joined: Sep 2005
Posts: 3,816 |
squeeze 150/70-18 tyre on 2.5 inch rim post a picture here ......we all need a good laugh  btw why its here in performance section? it has nothing to do with performance 
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Re: REALLY Big front tire
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Joined: Sep 2009
Posts: 1,202 Likes: 11
Learned Hand
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Learned Hand
Joined: Sep 2009
Posts: 1,202 Likes: 11 |
Quote:
\
btw why its here in performance section? it has nothing to do with performance
Of course it has!
More power, more torque, more gas, ... more rubber.
It's always about more, more, more... isn't it? 
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Re: REALLY Big front tire
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Joined: May 2009
Posts: 96
Member
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OP
Member
Joined: May 2009
Posts: 96 |
Thaks for all the input guys. After more research I found that the widest tire we can put on our 2.5" rims safetly is a 130 series. A 150 would be cool, but It'd be a LOT more work than I want to put into it. I feel fine pulling the fender. I think the forks will be plenty stiff without the crossover, and I've decided to go with a 130/80.  Have any of you gone with a 130/90 rear tire on the front? I'm wondering what the disadvantages would be besides slow speed handeling. Would it still be safe deep into corners, or is a rear tire have to wide/flat of a profile? Thanks, Bob
'04 Speedy. Emgo 19" turn-outs, Polaris bellmouth, 142/45 Thrux needles, 3.5 turns. Pod filters My Bike
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Re: REALLY Big front tire
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Joined: Jan 2005
Posts: 1,823
Learned Hand
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Learned Hand
Joined: Jan 2005
Posts: 1,823 |
Quote:
Thaks for all the input guys. After more research I found that the widest tire we can put on our 2.5" rims safetly is a 130 series. A 150 would be cool, but It'd be a LOT more work than I want to put into it. I feel fine pulling the fender. I think the forks will be plenty stiff without the crossover, and I've decided to go with a 130/80.
Have any of you gone with a 130/90 rear tire on the front? I'm wondering what the disadvantages would be besides slow speed handeling. Would it still be safe deep into corners, or is a rear tire have to wide/flat of a profile?
Thanks,
Bob
yes I have run 130/90 on the front and it handle well even at slower speeds ...but remember this move will make it not handle as well as it did before ...it will be different and you will have to get use to it..
Ed
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Re: REALLY Big front tire
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Joined: Jun 2007
Posts: 3,210
Loquacious
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Loquacious
Joined: Jun 2007
Posts: 3,210 |
ive been riding without a front fender or brace for 2 riding seasons now and I couldnt tell any difference in handling. I asked triumphdetroit a while back about it who works at a triumph dealership and he said it was cool as long as I wasnt ripping twisties at 120mph...haha
I'm safe
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 Re: REALLY Big front tire
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Joined: Jun 2006
Posts: 2,626
Loquacious
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Loquacious
Joined: Jun 2006
Posts: 2,626 |
One thing.
The 130/90 is 29mm taller than stock.
This will make your speedo read 33% slow.
A 130/70 (only 3mm taller) will work better.
Steelheart- '03 Speedmaster Black/Yellow
The Hayabusa Killa
16" Shorties/140 mains/Airbox drilled
Procom CDI
"There is no cure for Celibacy. But we can treat the symptoms."
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Re: REALLY Big front tire
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Joined: Sep 2005
Posts: 3,816
Freelance Jedi Knight
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Freelance Jedi Knight
Joined: Sep 2005
Posts: 3,816 |
Quote:
One thing.
The 130/90 is 29mm taller than stock.
This will make your speedo read 33% slow.
A 130/70 (only 3mm taller) will work better.
2.5 inch stock rim is not wide enough 
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Re: REALLY Big front tire
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Joined: Jan 2005
Posts: 1,823
Learned Hand
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Learned Hand
Joined: Jan 2005
Posts: 1,823 |
Quote:
Quote:
One thing.
The 130/90 is 29mm taller than stock.
This will make your speedo read 33% slow.
A 130/70 (only 3mm taller) will work better.
2.5 inch stock rim is not wide enough
well the AVON FITMENT CART SAY IT WILL.....
Ed
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Re: REALLY Big front tire
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Joined: Jan 2008
Posts: 1,174 Likes: 15
Learned Hand
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Learned Hand
Joined: Jan 2008
Posts: 1,174 Likes: 15 |
I have a 130/70-18 on my stock rim. fit just fine.
Plenty of other have done this as well.
there is a whole long thread on big front tires in (I think) the customs section.
05 speedmaster - 1100cc, 11:1 racing pistons, Carillo rods, thunderbike cams, ported and polished head, 2mm over intake and exhaust valves, Barnett kevlar clutch, scepter pipes, oversize manifolds, 45mm HSR's, TTP stage 4 firestarter
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Re: REALLY Big front tire
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Joined: Sep 2005
Posts: 3,816
Freelance Jedi Knight
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Freelance Jedi Knight
Joined: Sep 2005
Posts: 3,816 |
Quote:
Quote:
Quote:
One thing.
The 130/90 is 29mm taller than stock.
This will make your speedo read 33% slow.
A 130/70 (only 3mm taller) will work better.
2.5 inch stock rim is not wide enough
well the AVON FITMENT CART SAY IT WILL.....
Ed
Venom AM41 (front) 130/70B18 69H MT3.50 3.00 - 4.00 130 5.1 647 25.5 4.8
Cobra AV71 (front) 130/70R18 63H MT3.50 3.50 - 4.00 128 5.0 647 25.5 4.7
Last edited by Grzegorz; 12/29/2009 5:44 PM.
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Re: REALLY Big front tire
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Joined: Sep 2005
Posts: 3,816
Freelance Jedi Knight
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Freelance Jedi Knight
Joined: Sep 2005
Posts: 3,816 |
Quote:
I have a 130/70-18 on my stock rim. fit just fine.
Plenty of other have done this as well.
there is a whole long thread on big front tires in (I think) the customs section.
You can put wide tyre on narrow rim it just loosing its designed shape
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Re: REALLY Big front tire
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Joined: Jan 2005
Posts: 1,823
Learned Hand
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Learned Hand
Joined: Jan 2005
Posts: 1,823 |
kind of tire...........SIZE..........alt rim (in) min/max... avon Roadrider AM26, 120/80-18 62A, 2.50 - 3.00 avon Roadrider AM26, 130/80-18 66V, 2.50 - 3.00 also the METZELER 130/80V18 TL (66V) 2.50 - 3.50 ED LINK web page
Last edited by biker; 12/29/2009 6:07 PM.
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Re: REALLY Big front tire
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Joined: Sep 2005
Posts: 3,816
Freelance Jedi Knight
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Freelance Jedi Knight
Joined: Sep 2005
Posts: 3,816 |
but roadrider tyres have no size for rear wheel
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