Will this gearing be okay for road?
#26
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Should be fine, even with hills.
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You might want lower (sub 1:1) gearing for another reason. On bumpier gravel, you want to be able to spin faster uphill so you get more gyroscopic movement to keep better balance.
#28
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I managed to get one of these at around 50% discount:
Blue Competition Cycles-PROSECCO EX-GRAVEL
It was mentioned in a different thread in this section asking why it's not more popular. At that time I couldn't find a good price on it here in the UK. Then a few days ago I found the bike in a clearout sale.
Blue Competition Cycles-PROSECCO EX-GRAVEL
It was mentioned in a different thread in this section asking why it's not more popular. At that time I couldn't find a good price on it here in the UK. Then a few days ago I found the bike in a clearout sale.
I swapped out the cassette for an 11-32, which worked just fine despite the short cage RD. This has helped quite a bit with getting up our steep gravel climbs.
#29
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I should be getting the bike later this week as it’s in the retailer’s workshop being assembled and set up at the moment.
It would be good to exchange info and tips on this bike in due course.
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That’s great to know! It’s been hard to get owners’ views on this bike as it’s quite rare and Google searches come up with very little info.
I should be getting the bike later this week as it’s in the retailer’s workshop being assembled and set up at the moment.
It would be good to exchange info and tips on this bike in due course.
I should be getting the bike later this week as it’s in the retailer’s workshop being assembled and set up at the moment.
It would be good to exchange info and tips on this bike in due course.
It appears that the main difference in geometry is that they lowered the stack and seat tube height on yours. Still, you're right, there are not a lot of Blue bicycles around!
#31
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I just realized that I was buzzed from gravel grinding yesterday and spoke too soon...I have a slightly older and lower-end version of the Prosecco, with all mechanical components.
It appears that the main difference in geometry is that they lowered the stack and seat tube height on yours. Still, you're right, there are not a lot of Blue bicycles around!
It appears that the main difference in geometry is that they lowered the stack and seat tube height on yours. Still, you're right, there are not a lot of Blue bicycles around!
#32
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I'm using 46/30 Chainrings with an 11-36 cassette and have been very happy with how it works on both my Uphill climbs and Downhill descents.
#33
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To put things into an easy formula…
How easily you’ll climb up a hill will be determined by:
# of teeth in smallest chainring / # of teeth in biggest cog
The smaller the number the steeper you can climb. You probably want that number to be no bigger than 1.06 (34/32). Given that you’re a big rider, ideally the number would be less than 0.
How fast fast you can go without spinning out will be determined by:
# of teeth in biggest chainring / # of teeth on smallest cog
The bigger the number the better. Most road bikes have numbers over 4 with 4.5 (50/11) being a typical max number.
The circumference of the wheel also plays a role. You can multiply the numbers above by the circumference of your tire and then compare those numbers if tire/wheel size is a variable for you.
How easily you’ll climb up a hill will be determined by:
# of teeth in smallest chainring / # of teeth in biggest cog
The smaller the number the steeper you can climb. You probably want that number to be no bigger than 1.06 (34/32). Given that you’re a big rider, ideally the number would be less than 0.
How fast fast you can go without spinning out will be determined by:
# of teeth in biggest chainring / # of teeth on smallest cog
The bigger the number the better. Most road bikes have numbers over 4 with 4.5 (50/11) being a typical max number.
The circumference of the wheel also plays a role. You can multiply the numbers above by the circumference of your tire and then compare those numbers if tire/wheel size is a variable for you.
#34
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I’m looking at a gravel bike with the following gearing:
Chainrings: 36/46T
Cassette: 11/28T
Not understanding a great deal about gearing at the moment, would the above be fine for road (tarmac) use in comparison with the gearing you would get on a dedicated road bike? Or would this be significantly slower?
I see that road bikes would typically have a larger chainring with 50T to 53T, but I’m wondering what real-world difference it would make compared to 46T for a very average leisure cyclist like me.
Chainrings: 36/46T
Cassette: 11/28T
Not understanding a great deal about gearing at the moment, would the above be fine for road (tarmac) use in comparison with the gearing you would get on a dedicated road bike? Or would this be significantly slower?
I see that road bikes would typically have a larger chainring with 50T to 53T, but I’m wondering what real-world difference it would make compared to 46T for a very average leisure cyclist like me.
For the low end in the downhills, you'll be fine in a 46x11 (4.18 ratio). My current road bikes highest gear is 12x50 (4.17 ratio). The difference in speed at 90rpm in those two gearings is pretty much the same. Unless you are trying to better your Strava sprint times it wont make much of a difference. I rarely drop to my 12 unless I am full out on a downhill. On the flats pushing 50x14 (3.57 ratio) at 25mph is about as much as I have and can maybe hold that for about 1.5 - 2 miles before I burn out. So you should be fine on the 46x11 on the low end.
On the high end - the gearing (36x28 or 1.29 ratio) is just enough to get an in-shape rider up a tough incline on a paved road. We have some tough little climbs around here (1.5 - 2 miles or so with 10-15% grades on parts of the climbs) and I can make it with my road bike in a 34x25 (1.36) albeit I am grinding at 60rpm up the tough parts of the climb and 75-85 rpm up the rest of the climb. I really need to get a 34x28 (1.21 ratio) setup for these climbs to keep me from grinding through the toughest parts. So on paved road, the 36x28 (1.29) would be just enough on the toughest climbs. On gravel road climbs you definitely need lower gears. A 36x32 might be better suited for gravel and even lower if you are going up back mountain trails with slight obstacles to traverse.
Going forward on this bike I will probably switch out to compact gears in front (50/34) with a 12-30 or 12-32 (if I can get away with the short cage derailleur) and use it for winter riding and exploring all the dirt and gravel roads I regularly ride past. It'll probably end up being my all around go-to long ride, exploring, gravel road beater bike. I'll keep a road specific bike for the Strava segments on the paved roads and maybe an off road specific bike in the future....
-Sean
PS - For reference, gear ratio is how many times your rear wheel turns per full revolution of the cranks. Bike Calc has an easy to use site for reference.
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