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gearing question

Old 05-28-19, 01:30 AM
  #1  
illdrag0n
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gearing question

Hey all,

Complete gear noob.

I'm replacing the worn outer ring on my bike - it's an FSA 46/36 with 11-28 cassette.

It's proving impossible to find another 46 for this crankset. Plenty of 50T in stock.

I'd considered going higher teeth for faster flats, but how hard would i find pushing 50 and 11-28? I'm no athlete, very overweight.

I have 11-30 on my spare wheelset, i could bring that accross and reindex the rear deraileur if it's a better option.

What's people's opinion?
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Old 05-28-19, 04:53 AM
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I'm not sure which FSA 46t chainring you need, but both of these are in stock.

https://www.amazon.com/FSA-Super-Cha.../dp/B007HVGCP2
https://www.ebay.com/itm/FSA-OMEGA-V...-/163650190546
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Old 05-28-19, 08:43 AM
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fietsbob 
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46-36 is a cyclocross combination .. 50-34 road ..

bike factories buy whole cranksets, but you can find spare chainrings outside of amazon..


..
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Old 05-28-19, 09:02 AM
  #4  
CycleryNorth81
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You will need to know your cranks bcd to find the correct ring.
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Old 05-28-19, 09:07 AM
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A 50 won't make you any faster on the flats unless you are already doing 30+mph regularly.
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Old 05-28-19, 12:56 PM
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Bill Kapaun
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Originally Posted by illdrag0n View Post
......I'd considered going higher teeth for faster flats, but how hard would i find pushing 50 and 11-28? I'm no athlete, very overweight.......
Can you spin out with the 46?
If you can't, you might consider a smaller big ring or else a cassette change with a larger smallest cog.
Higher gears don't make you faster if you don't have the strength to spin them.
As a side note-
After I got a speedometer for reference, I discovered I was a tiny bit faster (.1-.2MPH) spinning the next lower gear. The BIG PLUS was that I could spin MUCH LONGER before I fatigued. Pushing HARDER doesn't always make you faster if you're geared too high and just puts you in oxygen debt sooner. You may just burn yourself out and be much slower for the rest of your ride.
It's about what gearing & cadence works best for your body.
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Old 05-28-19, 01:04 PM
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Originally Posted by illdrag0n View Post
Hey all,

Complete gear noob.

I'm replacing the worn outer ring on my bike - it's an FSA 46/36 with 11-28 cassette.

It's proving impossible to find another 46 for this crankset. Plenty of 50T in stock.

I'd considered going higher teeth for faster flats, but how hard would i find pushing 50 and 11-28? I'm no athlete, very overweight.

I have 11-30 on my spare wheelset, i could bring that accross and reindex the rear deraileur if it's a better option.

What's people's opinion?
Do you really need an 11t cog? 46x11 is nearly identical to 50x12.
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Old 05-28-19, 04:52 PM
  #8  
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Thanks all. I ended up ordering a like for like replacement (FSA Pro Road 110BCD 46T) off Amazon.

I'm based in AUS and had not really considered Amazon.

Yes it's a CX bike, i use it for commuting and weight loss. I'm 147kg (down from 175kg start of year) and average around 22km/h. Can be as quick as 28-30km/h on the flats. I don't max the ring out so 50T probably isn't required.

My legs are quite strong, and i expect i'll get quicker as the weight continues to come off. Instead of changing the gearing i might just buy a dedicated endurance road and stick the knobblies back on my focus for offroad trekking.

Thanks all, sorry for the runaround.
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Old 05-28-19, 07:14 PM
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Originally Posted by illdrag0n View Post
Thanks all. I ended up ordering a like for like replacement (FSA Pro Road 110BCD 46T) off Amazon.

I'm based in AUS and had not really considered Amazon.

Yes it's a CX bike, i use it for commuting and weight loss. I'm 147kg (down from 175kg start of year) and average around 22km/h. Can be as quick as 28-30km/h on the flats. I don't max the ring out so 50T probably isn't required.

My legs are quite strong, and i expect i'll get quicker as the weight continues to come off. Instead of changing the gearing i might just buy a dedicated endurance road and stick the knobblies back on my focus for offroad trekking.

Thanks all, sorry for the runaround.
No worries and happy riding! I ride my gravel bike on the road with a 46-36 with 11-28. I do not overspin on the flat (46x11 at a cadence of 95 rpm is close to 55 km/h!!). I do when descending but hey! that's fine for me. And I find that at my most common speed (30-35 km/h) i am in the sweet spot of my cassette and I minimize the use of my 36 on flat roads.
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