Did anyone try using a hitch bike rack on gravity? Can someone share information on weight restrictions for using hitch bile rack. Any idea if this can be done right away when i get a gravity with tow package or does it need the tow mode software update? Thanks!
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Lucid Gravity Reservation Tracker: Add Your Gravity Reservation
Gravity Bike Rack
- Thread starter krislucid
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Page 114: https://lucidmotors.com/media/document/Lucid-Gravity-Owners-Manual_en-US.pdf
Weight limit is 110lbs.
Weight limit is 110lbs.
Any idea if i need to wait for tow package software update or can use it right away?
The manual only says not to tow until the upgrade (ridiculous! )
110lbs is completely inexcusable for a family hauler. My vertical bike rake weighs ~100 lbs and that's before I put 3-5 mountain bikes (non-ebikes) on it. This is really disappointing. Why didn't they do what others do and have a panel on vertical part of the rear bumper with a permanent receiver vs the bottom mounted removable.
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We're going to need some kind of special Lucid titanium bike rack.
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I've been posting about since they released the manual. Crazy low weight and I've checked with multiple sources: 110 pound is what we get.
I had already purchased an EXO Swingy Cargo system. I can use it...to stow about 5-10 pounds. lol. Time to put it up for sale...ugh.
My only hope is that Rack Attack or someone else comes out with an aftermarket solution that allows for more, but even then, I doubt Lucid would approve.
I think we found a "compromise."
I had already purchased an EXO Swingy Cargo system. I can use it...to stow about 5-10 pounds. lol. Time to put it up for sale...ugh.
My only hope is that Rack Attack or someone else comes out with an aftermarket solution that allows for more, but even then, I doubt Lucid would approve.
I think we found a "compromise."
And they had the audacity to post a few videos with a pro MTB rider on their facebook page and the Gravity X. Why do you need a 7 passenger SUV if you can only take 2 bikes on the back!!! I think the only option will be a 3rd party aftermarket hitch unfortunately
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My assumption is that the weight limit is pending tow mode or some other structural approval... it does seem bizarrely low.
I hope so.
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Model X has the same hitch and the same limit. The issue is the long moment arm and the dynamic load of the bikes while the car is accelerating. Also, if you have the type of rack that swings out of the way, the weight gets magnified.
It's a very different dynamic than towing a trailer. The downward force doesn't change under acceleration, so the torsion doesn't change. Tow mode will be about the driving dynamics understanding the extra mass being pulled and the effects on braking. Possibly also being able to control brakes on the trailer.
Tow mode isn't going to change the weight rating of the hitch.
It's a very different dynamic than towing a trailer. The downward force doesn't change under acceleration, so the torsion doesn't change. Tow mode will be about the driving dynamics understanding the extra mass being pulled and the effects on braking. Possibly also being able to control brakes on the trailer.
Tow mode isn't going to change the weight rating of the hitch.
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I'm not sure I care why we can't get it. I'm just frustrated that we can't. A google search of Yakima Exo Cargo Box on SUV shows a ton of cars that use it that are far less capable and expensive as the Gravity. I bought my Yakima as I was originally going R1S but would never have thought that a Gravity wasn't capable of handling it. Ugh. Oh well...at this point, I'm just repeating my same complaint... Onward.
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For comparison, Rivian's R1S has a max tongue weight of 810 lbs. 700lbs to spare over Gravity.
Sounds more like it, my BMW is 720. 100 pounds is basically useless.
Gravity tongue weight is 600lbs
@johnse nailed it.
The issue when carrying bikes / cargo boxes etc is the moment arm (the distance ) since now your weight is leveraged back a few feet. So the acceleration forwards/ backwards and up and down (since roads aren’t perfectly smooth your rack and bikes bounce a lot) puts a huge load on the hitch. Which is why 3+ bike racks use a 2” receiver vs a 1.25” on a 2 bike rack
I’ve sent Lucid a message via Facebook asking what the solution is for more than 3 bikes and boxes. I’ll see what they respond and will post it here.
@johnse nailed it.
The issue when carrying bikes / cargo boxes etc is the moment arm (the distance ) since now your weight is leveraged back a few feet. So the acceleration forwards/ backwards and up and down (since roads aren’t perfectly smooth your rack and bikes bounce a lot) puts a huge load on the hitch. Which is why 3+ bike racks use a 2” receiver vs a 1.25” on a 2 bike rack
I’ve sent Lucid a message via Facebook asking what the solution is for more than 3 bikes and boxes. I’ll see what they respond and will post it here.
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Sounds like this solves the argument of if Gravity is an SUV, Minivan or Station Wagon. A proper SUV would have 700+ lb tongue weight capacity. Gravity (and Model X) are Minivan/Station Wagons.
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There is no car where the bike rack capacity is the same as the tongue weight limit. Some manufacturers just don't get involved and list the tongue weight limit and leave it at that. There is a standard for measuring the tongue weight limit and they follow that, but there is no standard for measuring rack weight limits so you rarely see them mention it.
But, there is no cheating physics. The leverage of a bike rack makes it far less likely that you can use the tongue weight limit as a guide. Lucid is making this explicit as do some other manufacturers. The physics isn't unique to Lucid, they did not skimp on design, they're just honest about something that other players in the industry don't bother with. Here's an article from a rack distributor.
rockymounts.com
But, there is no cheating physics. The leverage of a bike rack makes it far less likely that you can use the tongue weight limit as a guide. Lucid is making this explicit as do some other manufacturers. The physics isn't unique to Lucid, they did not skimp on design, they're just honest about something that other players in the industry don't bother with. Here's an article from a rack distributor.
The ugly truth and confusion about Class I Hitch Bike Racks and the 1.25
We get questions daily about using RockyMounts hitch bike racks on Class I hitches as we do not approve our racks for use on Class I. Why? Read below, it requires understanding the loads a rack puts on the hitch and a brief history lesson. Both Class I and Class II Hitches have a 1.25"...
rockymounts.com
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And Hollywood Racks concurs.
hollywoodracks.com
There may be another factor at play here which might be why many manufacturers don't mention bike rack weights. The standard for towing expects about 10% of the trailer weight to sometimes be born by the hitch vertically. If your mount exceeds that, then you just list the 10% figure because that is all that towing a trailer requires.
If you exceed it by a lot, the dynamic nature of the bike racks and their leverage doesn't exceed the excess weight carrying ability of the hitch mount and so they don't bother to list a separate recommendation.
The 2 cars I've seen list a bike rack figure in the wild (Tesla and Lucid) both use the detachable hidden hitch. It may be that these hitches are fully capable of carrying the 10% weight, but not by a lot and so they find it necessary to mention a different weight for racks due to this leverage issue that other designs might get away with ignoring.
Trailer Hitch Technical Information
Know your Trailer Hitch Class before installing your rack/bikes! The Gross Trailer Weight (GTW) is the weight of the trailer & cargo. This can be measured by putting the fully loaded trailer on a vehicle scale. TONGUE WEIGHT (TW) is the downward weight that is applied on the hitch ball by the...
hollywoodracks.com
There may be another factor at play here which might be why many manufacturers don't mention bike rack weights. The standard for towing expects about 10% of the trailer weight to sometimes be born by the hitch vertically. If your mount exceeds that, then you just list the 10% figure because that is all that towing a trailer requires.
If you exceed it by a lot, the dynamic nature of the bike racks and their leverage doesn't exceed the excess weight carrying ability of the hitch mount and so they don't bother to list a separate recommendation.
The 2 cars I've seen list a bike rack figure in the wild (Tesla and Lucid) both use the detachable hidden hitch. It may be that these hitches are fully capable of carrying the 10% weight, but not by a lot and so they find it necessary to mention a different weight for racks due to this leverage issue that other designs might get away with ignoring.
