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Discussion Starter · #1 ·
I'm sure I'm not the only person to see this but why in the world would Toyota put only 5 lug nuts on their truck? Maybe they put too much money into advertising.
 

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Discussion Starter · #3 ·
I don't understand it either and what other kind of effects would it have on peformance besides less strength on the axles?
 

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The amount of bolts is kind of irrelevant. As long as the studs are bigger, you can use less of them and still have the same strength. Without knowing they type of material, the thickness, and lots of other variables you can't say that ours is stronger just because we have one extra stud. Even if we only had 4 studs, they would still not be the weakest link in a truck. Those 4 studs would still hold more weight than our trucks are rated for. You really should see what holds the main drive shaft on a bell 206 helicopter. It is 8 1/4 inch studs, and they hold the drive shaft in the transmission. They are holding the m/r drive shaft, head, and rotor blades to the transmission. So they are supporting all of the load of the helicopter.
 

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HudsonValleyTitan said:
Ok maybe I'm an idiot on this topic but, what does the amount of lugs have to do with the trucks 1/2 ton rating?
Are you asking that of me?
 

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HudsonValleyTitan said:
lol....anyone who can answer it. I really don't know.
The closer the bolts are together, the more side load it can take.

That was kind of the question that I was hinting at when I made my first post. I really don't see that our trucks need 6, but it sure can't hurt.
 

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helomech said:
The closer the bolts are together, the more side load it can take.

That was kind of the question that I was hinting at when I made my first post. I really don't see that our trucks need 6, but it sure can't hurt.
So the amount and not the size of the lugs is what's important? Maybe the ones with 5 lugs have a bigger diameter or something. It's funny, I've never even noticed the damn lugs...lol.
 

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HudsonValleyTitan said:
So the amount and not the size of the lugs is what's important? Maybe the ones with 5 lugs have a bigger diameter or something. It's funny, I've never even noticed the damn lugs...lol.
Yes, the ones with less usually are bigger, I really don't think 6 is any better than 5. It is better to spread the load out, but 5 studs the thickness of ours is very strong. Before you could break even 5 lug nuts, you would probably bend the rearend. I hope this makes sense, I am not the best at explaining things.
 

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I've noticed a big jump in load ratings on some of the wheels in the 8 bolt patterns.

Like helomech said though, the closeness of the bolts is probably the reason ... even though the 8-bolt has a bigger circle than the 5 or 6 bolt patterns listed below, they are still closer together.

For example a Procomp 6089 for a 17" diameter by 8" width rims at 5, 6, and 8 bolts.
Edit: Bolt pattern is given in diameter, so multiply diameter times 3.142, then divide by number of bolts, to get distance between bolts.

Bolt Circ. Max-Load Weight
5x135mm 2200lbs 27lbs [3.34" on center].
6x5.5" 2200lbs 27lbs [2.88" on center, (Titan)].
8x6.5" 3420lbs 27lbs [2.55" on center, (closest bolts and biggest load)].
 

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Discussion Starter · #12 ·
Somebody needs to find the diameter of the lugs on both trucks.
 

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Discussion Starter · #13 ·
I have aftermarket rims and The lugs are 1 inch from flat side to flat side and each lug is about 2.75 inches apart. That might help.
 

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You're right it's pi * the diameter divided by the number of bolts ... So for the Titans 5.5" diameter, the circumference is 17.281". And the distance between them is 2.88". Lug nuts are 12mm x 1.25 thread, according to sfxperformance.

So, for the 8 lug wheel example it would be 2.55".

According to Discount Tire, the '08 Tundra b.p. is 5 on 150mm, or 5 on 5.906". Therefore, it's bolts are about 3.71" apart ... quite a bit further apart than the Titan's, but a little larger bolt.
'08 Tundra lug nuts: 14mm x 1.5 OE thread pitch.
 

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the hubs on the new tundras also have a larger diameter than other 1/2 tons... also a new size aftermarket wheel lug pattern had to be created to accomodate the new tundras as well...

Tundra's new bolt pattern... 5X150MM BOLT PATTERN

i know many of you have said the look is growing on you. not me... they're still ugly as sin, i just can't get over the look. its ugliness matches that of a Pontiac Aztek. just can't stand to look at it no matter what angle, whether its lifted, or any other application...
 

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This all boils down to a matter of bolt shear. It's just that simple.

For example, a 3/4" diameter Grade 8 bolt can take 40,200 lb. of shear. Multiply that by 6 (on our trucks) and you have 241,200 lb. of shear capacity on the bolts. There is a reduction required as you can't count on all of them fully engaging, but let's ignore that for a second.

Now take the larger Tundra bolts, 7/8" diameter, Grade 8, with a shear capacity of 54,700 lb. each. Multiply by 5 and you have 273,500 lb. of shear resistance.

For those of you who hope to be math scholars, you'll see the Tundra's figure is larger than our Titans by almost 12%. What does this mean? For the most part, nothing. But it allows them to run 5-lug wheels because each lug is larger in diameter and therefore can handle more shear.

Hope this explains it for you.....
 

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The Tundra looks a lot better with the painted front end trim than that ugly chrome trim that is way out of place.
 

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helomech said:
The amount of bolts is kind of irrelevant. As long as the studs are bigger, you can use less of them and still have the same strength. Without knowing they type of material, the thickness, and lots of other variables you can't say that ours is stronger just because we have one extra stud. Even if we only had 4 studs, they would still not be the weakest link in a truck. Those 4 studs would still hold more weight than our trucks are rated for. You really should see what holds the main drive shaft on a bell 206 helicopter. It is 8 1/4 inch studs, and they hold the drive shaft in the transmission. They are holding the m/r drive shaft, head, and rotor blades to the transmission. So they are supporting all of the load of the helicopter.

and dont them that only 4 small bolts hold the the main rotor to the pillow blocks which holds the whole helicopter in the air:teethmast
 

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ecmeyla said:
and dont them that only 4 small bolts hold the the main rotor to the pillow blocks which holds the whole helicopter in the air:teethmast
Those bolts hold a cap on, it has been a while since I took the hub completely apart. But I think that those bolts hold in a shaft.
 

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Blackbeauty said:
This all boils down to a matter of bolt shear. It's just that simple.

For example, a 3/4" diameter Grade 8 bolt can take 40,200 lb. of shear. Multiply that by 6 (on our trucks) and you have 241,200 lb. of shear capacity on the bolts. There is a reduction required as you can't count on all of them fully engaging, but let's ignore that for a second.

Now take the larger Tundra bolts, 7/8" diameter, Grade 8, with a shear capacity of 54,700 lb. each. Multiply by 5 and you have 273,500 lb. of shear resistance.

For those of you who hope to be math scholars, you'll see the Tundra's figure is larger than our Titans by almost 12%. What does this mean? For the most part, nothing. But it allows them to run 5-lug wheels because each lug is larger in diameter and therefore can handle more shear.

Hope this explains it for you.....
Titan's 12mm is closer to 15/32", and the Tundra 14mm is closer to 9/16" ... about 17% larger.
 
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