Mathematicians: che...
 

Mathematicians: check my calculations (Pythagorean theorem?)

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Can someone just check my logic here?

 

It's been a long long time since I did O Level maths but I think I'm barking up the right tree here. Long story short, I've got a bike with a wheelbase on 1066mm which I suspect is slightly too long for this bike bag...

It's a Scion Aerocomfort Gravel 3.1 and the dimensions are on the website BUT whilst they provide a max dimension of 106cm between the front and rear mounting points (it has an internal rail system), the diagram has a 2cm difference in front and rear mount point heights. Initially I thought that might have provided enough wiggle room to just squeeze in a 106.6cm wheelbase bike but Pythagoras says no.

A = 23cm above baseline

B = 21cm above baseline

So, if the base of my imaginary triangle is their 106cm (C), and D is the vertical dimension of my imaginary triangle (A-B), then the max distance between front and rear mounting points (hence wheelbase) is only a gnats length longer and nowhere near 106.6cm?

Photo for illustration:

Scicon 3.1 Gravel Travel Bag.jpg


 
Posted : 11/02/2026 3:21 am
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106.018cm

Its a no go amigo.

Well done on making the questionsound super complicated btw. 🤣


 
Posted : 11/02/2026 7:16 am
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But if you turned the fork around (like they do when you buy a bike from Halfords) you would have a shorter wheelbase.


 
Posted : 11/02/2026 9:50 am
nickingsley reacted
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Posted by: BigJohn

But if you turned the fork around (like they do when you buy a bike from Halfords) you would have a shorter wheelbase.

No bueno..it's a drop bar gravel bike with stupidly short brake hoses and semi-integrated routing. If I could do that, I've already got a barely used Evoc bike bag it would fit in. But no, due to stupidity, Ill have to sell my existing bike bag and buy something else...

 


 
Posted : 11/02/2026 7:16 pm
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^ am I missing something here re semi-integrated routing?

Would not loosening the stem bolts and removing the front caliper from the forks would allow the fork to be turned?


 
Posted : 11/02/2026 8:01 pm
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Posted by: nickingsley

^ am I missing something here re semi-integrated routing?

Would not loosening the stem bolts and removing the front caliper from the forks would allow the fork to be turned?

Hmmm...that might work though not ideal as I'm trying to reduce jet-lagged induced faffing as much as possible. 

My other option is a new(er) Evoc road bike bag which can accommodate longer wheelbases but is a bit more expensive

 


 
Posted : 11/02/2026 8:21 pm
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Choices 🙂


 
Posted : 11/02/2026 9:11 pm
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What are the mounts like in the case? Sounds like it's only a bawhair too long so is there any option to stick an axle through the fork and the mounts then zip tie them together?


 
Posted : 11/02/2026 10:04 pm
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Might not work but if you used a bar slightly thinner than the regular thru axle at one end could you get it to attach? Or if there is an insert for the part in the case that is a larger size than one or boths of your axles then swapping that out might give you a couple of mm.


 
Posted : 11/02/2026 10:32 pm
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Posted by: thepurist

What are the mounts like in the case? 

Dunno as Scicon only sell them mail order so not had a good look and the couple of YouTube videos I've watched don't show close ups of them. I wonder whether something could be 3D printed to workaround this....

I may have to order one and return if it I can't get it to work...

 


 
Posted : 12/02/2026 12:17 am
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It’s 6mm.  Flex in the fork will almost certainly allow you to make it fit and if not, just loosening the stem and top cap bolts will allow enough play at the headset to get 6mm at the axle. 


 
Posted : 12/02/2026 6:28 am