Author Topic: Straight line performance tire choices? ECTA 4/24 link (Read 3069 times)

Don R · « **on:** January 27, 2022, 09:44:16 PM »

I do not care about rounding a corner on this bike, ground clearance not an issue, it will be for straight line performance 1/8 to 1/2 mile. cb750, aftermarket swingarm. +1 welded stock, +2 +4 or +6" aftermarket.

I'm frustrated with trying to match brands and types of tires. 19" front and 18" rear as wide as the chain will allow. Modifications are OK and preferred. The 1/2 mile folks want speed rated H or V and radials.
This thing will probably go fast a few times but be more of a show bike in reality.

Tracksnblades1 · « **Reply #1 on:** January 28, 2022, 08:45:39 AM »

I always ran a 130/90/17 Metzeler or a Continental.
Neither had much trouble holding back a stock 76F1SS.
Once warmed up.
But I always ran a 18/45 530RK for interstate speeds.

Don R · « **Reply #2 on:** January 28, 2022, 09:13:06 AM »

M&H is advertising a 4.5"X18" front runner as a DOT motorcycle tire. They have 28" tall and a 4.5"X16" that is 27" tall.

BomberMann650 · « **Reply #3 on:** January 28, 2022, 01:57:09 PM »

Im leafing through the Fat Book trying to find something for ya. Which at least vaguely resembles a drag radial.
Aaannd I'm stumped. You'd think Drag Specialties would have a p/n for a drag bike tire 🤷‍♂️

Didnt even see the shinko smoothies

Stev-o · « **Reply #4 on:** January 28, 2022, 02:14:37 PM »

Summit has rear slicks...

https://www.summitracing.com/parts/MNH-MVD009?seid=srese1&gclid=Cj0KCQiAxc6PBhCEARIsAH8Hff2iC5nlZ6Um5wIY1ic9fteek9om-P_U0OTM60_ElSmMroPf5Ld5M1UaAjvJEALw_wcB

Don - surprised you all all people didnt check their website.

Don R · « **Reply #5 on:** January 28, 2022, 03:08:54 PM »

I saw that on M&H's page and Summit, I didn't mention that the 1/2 mile folks won't allow a drag slick or a bias ply, which I do not understand. I think they are used to the Hayabusa (superbike) types. I may need two different rear tires if it goes 1/2 mile or longer racing.

dusterdude · « **Reply #6 on:** January 28, 2022, 04:00:51 PM »

Shinko

Sent from my SM-G973U1 using Tapatalk

BomberMann650 · « **Reply #7 on:** January 28, 2022, 04:47:13 PM »

If you were running a 200r17 rear the tire selection would be easy!

Was even flipping through the v-twin section for r18 tires. Cruiser types usually have a flatter top. But many are bias ply so *poop*

That said Heidenau has something interesting. https://www.revzilla.com/motorcycle/heidenau-k65r-racing-tires?sku_id=1010406

dragracer · « **Reply #8 on:** January 30, 2022, 08:25:18 PM »

Not certain the power level of your package or exact wheel base but I've not had good luck with any brand 18" tires with my bike setup. I spent a lot of time doing compound research and purchased numerous tires over the years. I never found an 18" tire that met my needs for launching my bike. I relented and installed a 17" rear rim so my choices for sticky tires would increase. My tire of choice is the 17" Shinko Hookup in the 180 size. Bill has had some success with an 18" Shinko tire on Purple Rain. I think Trey has run some low 11 second passes on that tire. Check with Billy as to which tire he uses. Keep in mind that Purple Rain has a much shorter wheelbase than my F3 and they don't launch that bike nearly as hard as I leave with my bike. That tire has limitations they haven't reached yet and you may not either with your bike. Let us know what you come up with and the results. Tire technology has changed a lot since I experimented with 18" diameters over the last 25 plus years.

scottly · « **Reply #9 on:** January 30, 2022, 09:11:59 PM »

Wait a minute. Are you talking about drag racing or speed record stuff? Two entirely different things, as a tire for the dragstrip might not be the best choice for Bonnville or the Mojave Mile.

dragracer · « **Reply #10 on:** January 30, 2022, 10:42:25 PM »

Quote from: scottly on January 30, 2022, 09:11:59 PM

Wait a minute. Are you talking about drag racing or speed record stuff? Two entirely different things, as a tire for the dragstrip might not be the best choice for Bonnville or the Mojave Mile.

In his initial post I read straight line performance, 1/8th mile to 1/2 mile. Sounds a lot like dragracing to me but I could be wrong. You know how my mind works🤣

gschuld · « **Reply #11 on:** January 31, 2022, 04:57:21 AM »

For anything drag racing related, listen to Frankie…🙄

For 1/2 mile speed run, I’m sure the Shinko hookup is still a good tire at the speeds the bike is capable of(modern bikes go faster in 1/4 mile mph)

If the 1/2 mile is a timed ET run on asphalt as well as MPH, a rounded profile drag tire like Frankie’s Shinko makes sense. It it’s a max MPH only run, the launch doesn’t matter. You will reach maximum mph regardless of the first 100ft acceleration. Perhaps something like the Road Race Continental CR3 (CR for classic racing) would suit you there(18” tires). It’s still a DOT legal tire, but is a grippy set not expecting long mileage.😎

George
Things would change for stuff like Bonneville Salt Flats as initial launch means nothing, it’s about very gradually increasing speed because the salt traction is similar to packed dirt.

Don R · « **Reply #12 on:** January 31, 2022, 11:15:01 AM »

For clarification I'm primarily thinking 1/8 and 1/4 mile drag racing on pavement but there is a half mile airport event not too far away that sounds like a blast. They don't allow drag slicks or bias ply tires though. I'm not opposed to wheel swapping in that case. The PO is taking his Busa and dropped a hint he'd like to see his old 750 there.

The reason I asked about 18" is I have a 3x18 Lester mag and a 3.5x18 wire spoke DID rim. I do have a set of stock width cb750A rims laced up to hubs.

It appears I apparently will need different rear tires for either type of event. The bike in question is 836 with compression, cammed, carb'd and ported. If I get brave there is a turbo or a stroker but I'm not sure either is up to lasting as a race engine.

BomberMann650 · « **Reply #13 on:** January 31, 2022, 12:43:33 PM »

I keep looking at RevZilla tire finder. And the Heidenau continues to be the more available option.

Avon is out of stock at rz but they make classic sized radials.

Don R · « **Reply #14 on:** January 31, 2022, 12:52:51 PM »

Thanks for the help I'll check into them.
And by saying "straight line" I was trying to avoid the obligatory lecture about ruining the handling by going maximum width on the rear. ha!

One bike is getting a 16x5" M&H slick for sure. I have too many toys and my probable ADD gets in the way of doing just one thing.

gschuld · « **Reply #15 on:** January 31, 2022, 01:46:36 PM »

About the best compromise would be a set of radial DOT road race tires. They are street legal, near full slick compound, and meant for high speed. They will not, however, offer you the launch grip of a Shinko Hookup 180/17 rear tire. You’d need a 17” rim for that one though.

Continental CR3 road race tires or something like it may be your best bet. But thy match to 18” front wheels….

George

Don R · « **Reply #16 on:** March 18, 2022, 11:22:36 PM »

Thanks for the info guys it's all appreciated. I stumbled across a Shinko 16" Harley V twin tire that may be worth a try. I have a really nice 16" hog rim with stainless spokes and an M&H slick on it. It was mostly for looking at. Not decades old but old enough to be a bike show tire.

dragracer · « **Reply #17 on:** March 21, 2022, 10:53:21 AM »

Quote from: Don R on March 18, 2022, 11:22:36 PM

Thanks for the info guys it's all appreciated. I stumbled across a Shinko 16" Harley V twin tire that may be worth a try. I have a really nice 16" hog rim with stainless spokes and an M&H slick on it. It was mostly for looking at. Not decades old but old enough to be a bike show tire.

Bottom line, in the end you will likely not get the results you desire from that 16" tire. I regret all the time, money and effort i expended chasing a 18" tire simply because i had a wide 18" rim. In the end, I had to be realistic and convert to a 17" and in order to source a sticky compound tire to suit my needs. It just wasn't worth me chasing my tail all that time. I knew better on the front end of the build but paid the price on the back half. Overthinking is not a good thing sometimes.

Don R · « **Reply #18 on:** March 21, 2022, 04:08:15 PM »

https://shinkotireusa.com/product/stealth-d-tire/211912
I need to poll the Harley guys to see if it works.

dragracer · « **Reply #19 on:** March 23, 2022, 12:22:20 AM »

Don, after looking at the information in the link for the tire, that compound might just work perfectly for you. I stand corrected in my previous post. Let us know how it performs.

BomberMann650 · « **Reply #20 on:** March 23, 2022, 12:42:24 PM »

Quote from: Don R on March 21, 2022, 04:08:15 PM

https://shinkotireusa.com/product/stealth-d-tire/211912
I need to poll the Harley guys to see if it works.

Probably a safe bet.

Majority of cruiser tires are H rated.
Even the oem v-rod pirellis. Seldom see a W rating. Much less a ZR

Old Scrambler · « **Reply #21 on:** March 24, 2022, 08:40:48 AM »

Assuming early K chain location...........for the 1/2-mile I would mount an 18-inch tubeless wheel and stay somewhat narrow on the tire profile. No to the 16-inch spoked wheel for high-speeds above 120-mph. Any of the sport-bike radials will do the job without chunking. Who knows, you may like that 1/2-mile 'rush' and look for a mile event........or do a 'run what you brung' at Bonneville.

Check out the front-brake requirements as most of those airport venues are challenging and some have a sharp bend to negotiate at the end of the run

Also check the rules for chainguards and steering stabilizers.

Don R · « **Reply #22 on:** March 24, 2022, 11:46:07 AM »

So far I've seen, steel chain guard, steering stabilizer, recent radial tires, Safety wire, I forget, This event may be off I still have not found a 2022 date, although the PO of this bike says he is going to take his busa.
Thanks for the advice on the rear width. I've quit thinking of using the same tires for both venues and begun to collect enough stuff for two sets that can swap between bikes. That means they both will need the drum brake. The cheap Henry Abe 7 star rear rims I was shopping are both rear disc.

Don R · « **Reply #23 on:** March 27, 2022, 09:47:16 PM »

I got word the half mile event is off for this year. The promoters are out west so this one was a stretch for them.
The event they do at Gila bend AZ (SP?) was Saturday. Lucky me I found the promoters web page just a day too late for a heads up to the guys closer to it.
The bottom line is, I don't think I need to find Radial tires now.

BomberMann650 · « **Reply #24 on:** March 29, 2022, 12:54:14 PM »

Fwiw - my shopping experience for a classic width Z rated tire basically circled back to the dunlop q3

Granted, I'm likely to end up on a 3.5x17 (<--17) wheel.

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Author Topic: Straight line performance tire choices? ECTA 4/24 link (Read 3069 times)