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165mm crankset swap: Ride Report

3987 Views 15 Replies 12 Participants Last post by  brentos
175's on my bikes forever until now.
As a young roadie, a long time ago, turning over the the longer crank with a 26t cog while standing climbing just felt more natural with my tall and lanky physique.
All my mountain bikes got 175's along the way.

The 165's felt a little comical pedaling around my block when I first got them on, but out on the trail that short feeling went away in the first 20min.
165's do require a faster cadence than most of us spin. If you are a spinner (80-100rpm consistently) there is huge benefit for you. If you are a masher (60-75rpm) you are going to get used to pedaling a bit faster. I am inbetween, and most of the time it felt like I was pedaling 1/2 gear too easy or 1/2 too hard. The spin is most effective.
A oval ring is essential to the short crank. When first on the oval chainring, I noticed it layed down smoother power during climbing. The clocking of the oval combined with the faster entrance to powerstroke of the rotation magnifys this substantially.
At a smooth brisk cadence, the 165's deliver your best power output REALLY well, and noticeably quicker. Switchback's are much easier with the super quick burst of smooth power. Tech moves up ledges are easier with the same burst. And smooth cadence on sustained climbing in the saddle feels like my legs are having a good day.
The fewer pedal strikes is a nice bonus for right now, but it's just a matter of time before I get used to the new length and start clanking pedals on stuff again.
I do not have hip/knee issues, so lesser pain will not be an issue, but the lower angle of flexion is readily noticeable and I could see it helping old achey knees.
I do not ride with wattage/hrm data, so I can't give deffinitive answers as to my power output, but my rides have been on both smooth switchback climbs and slower singletrack with a lot of root step ups, and I have felt smoother/more efficient everywhere. It's not just my optomistic imagination. I rode better. Maybe not faster, but deffinitely better.
The 175mm carbon Descendant cranks weighed 480g without a chainring. The 165mm NX cranks weighed 540. I would like to get nicer cranks when they become available, but for 60g at 1/3 the price, I might put some plain black crankskins on them to cover the low budget labeling and use the money to replace my beat up old seat instead.

I drank the 165mm Kool-Aid... and it tasted pretty good :)
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175's on my bikes forever until now.
As a young roadie, a long time ago, turning over the the longer crank with a 26t cog while standing climbing just felt more natural with my tall and lanky physique.
All my mountain bikes got 175's along the way.

The 165's felt a little comical pedaling around my block when I first got them on, but out on the trail that short feeling went away in the first 20min.
165's do require a faster cadence than most of us spin. If you are a spinner (80-100rpm consistently) there is huge benefit for you. If you are a masher (60-75rpm) you are going to get used to pedaling a bit faster. I am inbetween, and most of the time it felt like I was pedaling 1/2 gear too easy or 1/2 too hard. The spin is most effective.
A oval ring is essential to the short crank. When first on the oval chainring, I noticed it layed down smoother power during climbing. The clocking of the oval combined with the faster entrance to powerstroke of the rotation magnifys this substantially.
At a smooth brisk cadence, the 165's deliver your best power output REALLY well, and noticeably quicker. Switchback's are much easier with the super quick burst of smooth power. Tech moves up ledges are easier with the same burst. And smooth cadence on sustained climbing in the saddle feels like my legs are having a good day.
The fewer pedal strikes is a nice bonus for right now, but it's just a matter of time before I get used to the new length and start clanking pedals on stuff again.
I do not have hip/knee issues, so lesser pain will not be an issue, but the lower angle of flexion is readily noticeable and I could see it helping old achey knees.
I do not ride with wattage/hrm data, so I can't give deffinitive answers as to my power output, but my rides have been on both smooth switchback climbs and slower singletrack with a lot of root step ups, and I have felt smoother/more efficient everywhere. It's not just my optomistic imagination. I rode better. Maybe not faster, but deffinitely better.
The 175mm carbon Descendant cranks weighed 480g without a chainring. The 165mm NX cranks weighed 540. I would like to get nicer cranks when they become available, but for 60g at 1/3 the price, I might put some plain black crankskins on them to cover the low budget labeling and use the money to replace my beat up old seat instead.

I drank the 165mm Kool-Aid... and it tasted pretty good :)
At 5'10" I was running 175s since I started mountain biking 20 years ago. I switched to 165s this summer and didn't have any issue with the switch. I also put on a Wolftooth 30t oval ring. I was looking at mitigating some knee pain and the switch did help with that. Was it all the crank length or the oval ring - I'll never know since I started using them both at the same time. I'm definitely going to keep running the 165s though.
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At 5'10" I was running 175s since I started mountain biking 20 years ago. I switched to 165s this summer and didn't have any issue with the switch. I also put on a Wolftooth 30t oval ring. I was looking at mitigating some knee pain and the switch did help with that. Was it all the crank length or the oval ring - I'll never know since I started using them both at the same time. I'm definitely going to keep running the 165s though.
What kind (area) of knee pain? Mine's on the inside front of my left knee. Been running into it some too and wonder if some of these swaps might help.
I am super short and am riding an extra small bike. I have no idea what the crank length is, but man they are short. I'm probably getting a new bike soon, so I dont think I am going to swap over. Maybe on my next bike.
175's on my bikes forever until now.
As a young roadie, a long time ago, turning over the the longer crank with a 26t cog while standing climbing just felt more natural with my tall and lanky physique.
All my mountain bikes got 175's along the way.

The 165's felt a little comical pedaling around my block when I first got them on, but out on the trail that short feeling went away in the first 20min.
165's do require a faster cadence than most of us spin. If you are a spinner (80-100rpm consistently) there is huge benefit for you. If you are a masher (60-75rpm) you are going to get used to pedaling a bit faster. I am inbetween, and most of the time it felt like I was pedaling 1/2 gear too easy or 1/2 too hard. The spin is most effective.
A oval ring is essential to the short crank. When first on the oval chainring, I noticed it layed down smoother power during climbing. The clocking of the oval combined with the faster entrance to powerstroke of the rotation magnifys this substantially.
At a smooth brisk cadence, the 165's deliver your best power output REALLY well, and noticeably quicker. Switchback's are much easier with the super quick burst of smooth power. Tech moves up ledges are easier with the same burst. And smooth cadence on sustained climbing in the saddle feels like my legs are having a good day.
The fewer pedal strikes is a nice bonus for right now, but it's just a matter of time before I get used to the new length and start clanking pedals on stuff again.
I do not have hip/knee issues, so lesser pain will not be an issue, but the lower angle of flexion is readily noticeable and I could see it helping old achey knees.
I do not ride with wattage/hrm data, so I can't give deffinitive answers as to my power output, but my rides have been on both smooth switchback climbs and slower singletrack with a lot of root step ups, and I have felt smoother/more efficient everywhere. It's not just my optomistic imagination. I rode better. Maybe not faster, but deffinitely better.
The 175mm carbon Descendant cranks weighed 480g without a chainring. The 165mm NX cranks weighed 540. I would like to get nicer cranks when they become available, but for 60g at 1/3 the price, I might put some plain black crankskins on them to cover the low budget labeling and use the money to replace my beat up old seat instead.

I drank the 165mm Kool-Aid... and it tasted pretty good :)
What's your height and inseam?
What about cornering? You effectively just raised your CoG by up to 10mm.

And if you adjusted your saddle height accordingly, did you raise/adjust the cockpit as well?
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What's your height and inseam?
Proportional 6’ tall with 32” inseam.
I considered 170mm cranks (more availability), but wanted the shorter length to really notice a difference.

I did raise the seat 7mm and the bars 2mm.
Higher COG, but only noticed on the way to the trail. Dropper post negates the issue.
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At 5'10" I was running 175s since I started mountain biking 20 years ago. I switched to 165s this summer and didn't have any issue with the switch. I also put on a Wolftooth 30t oval ring. I was looking at mitigating some knee pain and the switch did help with that. Was it all the crank length or the oval ring - I'll never know since I started using them both at the same time. I'm definitely going to keep running the 165s though.
lol, I read this and had to check if it wasn't me who wrote it. Identical setup and history.

What about cornering? You effectively just raised your CoG by up to 10mm.
And if you adjusted your saddle height accordingly, did you raise/adjust the cockpit as well?
Cornering isn't affected if you ride pedals level. I don't know how many would notice 1cm change in COG if they ride outside pedal low on a turn... I haven't. I didn't change anything in the cockpit area but being able to get a longer 200mm dropper installed slammed over the 180mm I had prior was a nice bonus.
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What about cornering? You effectively just raised your CoG by up to 10mm.

And if you adjusted your saddle height accordingly, did you raise/adjust the cockpit as well?
That's not true at all. Your feet should be at 3/9 o'clock and if you drop you dropper, for proper techie cornering the change of CoG should be negligible. If you like to corner sitting down on your saddle - then keep the longer cranks on your road bike.
That's not true at all. Your feet should be at 3/9 o'clock and if you drop you dropper, for proper techie cornering the change of CoG should be negligible. If you like to corner sitting down on your saddle - then keep the longer cranks on your road bike.
Well... most turning technicians would probably suggest that your outside foot is dropping below level at least some, and maybe as far as 6:00. But I agree that the "raised your CoG by up to 10mm" is a bit oversimplified and inaccurate. At high speeds, bike-body separation is going to drive the bike pretty far over, and that "raised your COG" is right out the window.
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BTW...anyone get their hands on these super fancy 155mm SX Eagle and X1 1000 Eagle cranks?

I currently run 170mm - which I know is too long and feels too long. I've tried 160mm on Levo, which felt great, but not sure what non-ebike cranks are available at 160mm. So it looks like either 165 or 155mm. FWIW, I'm 5'5" and my riding inseam is about 30.5"
What about cornering? You effectively just raised your CoG by up to 10mm.

And if you adjusted your saddle height accordingly, did you raise/adjust the cockpit as well?
You aren't sitting down when cornering, so you put your COG where ever you want. With your cranks horizontal the crank length is no different.

Yes, seat and bars are higher, a long dropper negates the seat issue, higher bar position sorta makes a difference in COG, but I like high bars :)

I ride 155mm on both my FS bikes, started riding 165's a few years back and never felt it was a disadvantage, some bike companies have started specing bikes with shorter cranks (Canfield).

Canfield makes cranks down to 150mm (y)

I'm 6' tall
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At 5'10" I was running 175s since I started mountain biking 20 years ago. I switched to 165s this summer and didn't have any issue with the switch.
Similar story except I'm 5'8". 175's since my first bike in '94. Tried 165's last December. Then moved to 155's. Now comes the expensive proposition of moving all my bikes to 155 or 160s
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Love my 165s...definitely interested in trying even shorter at some point.


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BTW...anyone get their hands on these super fancy 155mm SX Eagle and X1 1000 Eagle cranks?
I read somewhere that the SX 155mm cranks are OEM only. It wasn't a verified source though. You could buy a complete kids bike for about $2k though to get a set. :)
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