Polo bike geometry + addons

who copy who?

they will be Taiwanese and I'll be doing it for the polo love not the profit so 150 is achievable

Then that is awesome.

I wish i had a curvy hard-on

everyone copied me.

that violin is sweet snoops, terrible colour though.

Snoops, you are only 23-24, how is that possible?

I'm 76.

they will be Taiwanese and I'll be doing it for the polo love not the profit so 150 is achievable

Sound. Was on the verge of buying a new frame. Think I'll wait.

gabes is right, short chainstays and super steep head tube angle = win.

Has anyone tried designing a frame for two different sized wheels?

Me, but you need to convine:

• bb height with the smaller wheels (not to low)
  
• pedal overlap with big ones (longer wheelbase)
  
  

Anyway, 26x2.2 it's almost the same diameter than 700x28c. The hard thing is to convine diferent tire sizes, like 26x1.5 with 700x40c.

And last thing, brakes; you can put to v-brake mounts, or just one for 26" and caliper brake for 700c (like some old MTB).

Why would you want different sized wheels? I fail to see the point other than having to re-jig everything about established frame design and work from scratch?

You want a 69er mtb frame.

Designed for 26" rear and 700c front, give you better handling from the front end combined with a more nimble rear.

My weird winter bike has 24" rear and 26" front. Also has rear brake bosses on the chain stays, which is a nice touch. But I still prefer playing fixed on my Fuji track.

How does a 700c give better handing up front?

Apparently the larger wheel rolls smoother over rough ground and gives better stability. There's a bit more info on the offroad thread.

Not sure it'd help for polo, just putting it out there that there are plenty of frames designed for different size wheels.

What I said is having a frame that you can put 26" or 700c, but not mixing it. It changes a lot the geometry wen you do it.
Having a frame that you can put both wheel sizes, you get a bigger "market target" (looking it in the business way), or more people that can use your design.

Why would you want different sized wheels? I fail to see the point other than having to re-jig everything about established frame design and work from scratch?

Thread asked about best geo for polo, Smaller wheel means smaller wheelbase more nippy. If it's on the front possibility to lessen toe overlap too.

I didn't ask myself why keep a big wheel (ie why not have two smaller wheels), but I don't think dogma is a good reason to ignore the idea.

Was going for 700c wheels on your bike just because of availability/cost? Why doesn't everyone play with smaller wheels? Is it just for defending?

I wasn't convinced by smaller wheels back along and the Butterbean would've needed a big re-think, I'm not even sure if Per would have done a 26" wheeled version. Plus the wheelbase is already short enough for me, less weight would've been a good thing though.

I liked the idea of big wheels/tyres back along, now I'm not so sure... although you do seem to carry momentum more easily on bigger wheels (big circles for the win).

26" are good because you can build lighter wheels and they accelerate up to speed faster. The downsides are a lower angle of attack (harder to just roll over the ball) and the fact that whilst the bb height doesn't change much compared to a bigger wheel, the axles are lower. In theory this affects your balance.

700c are good because they roll over stuff easier, maintain momentum and will be more stable. The downsides are they're heavier and harder to get up to speed. A bigger wheel has a longer contact patch than a smaller wheel which obviously affects the rolling resistance but offers traction.

This is without getting into tyre widths and pressures and how they affect the contact patch. At the same pressure, a wider tyre decreases rolling resistance because it changes the shape of the contact patch from long to wide. This means more of the tyre stays circular. However, you can run narrower tyres at higher pressures so it all gets a bit confusing.

You also have to consider component choice/availability.

Smaller wheels does not necessarily mean a smaller wheelbase either. When you design a frame with bigger wheels, you need to tighten up the angles to get the same ride as a smaller wheeled frame. So if you were to make something like the MKE Bruiser in 26", you'd need to slacken it off a bit to give it the same trail.

Why would you want different sized wheels?

+1

I have a 26" at front, but only because the Handsomedogs have V-brake bosses for 26"