100Tours Posted December 11, 2022 Share 1 hour ago, Christie said: AFAIK oval rings have been proven to be ineffective - they came back into fassion when power meters became more common. Older power meters had a lower data sample rate, and some of these measured more power for oval rings. Modern meters allow higher sample rates, resulting in zero nett benefit from an oval ring. Assuming the power meter measures input power (?) then changing rings won't make a difference - they're still the same legs. What ovals are meant to do is to reduce the effective gear size in the dead spot. This means that the smaller muscles that you're using to get the crank through the dead spot have an easier job to do, and therefore less fatigue. Link to comment Share on other sites More sharing options...
jcza Posted December 11, 2022 Share 32 Chainring with 52 cassette? Are you riding in the Alps? Get a 34 ring. dardo82 1 Link to comment Share on other sites More sharing options...
DieselnDust Posted December 11, 2022 Share 3 hours ago, openmind said: SRAM is either 10/50 or 10/52 Shimano is 10/51 I prefer the Shimano ratios, they don’t have the “bail out” gear philosophy, the ratios are spaced out more evenly so you can use the whole block. Actually that’s subjective. the lower the ratio goes the bigger the jump needs to be too maintain power out output at rpm. 10-52 is ideal. It will of course vary from rider to rider. Link to comment Share on other sites More sharing options...
DieselnDust Posted December 11, 2022 Share 2 hours ago, 100Tours said: Assuming the power meter measures input power (?) then changing rings won't make a difference - they're still the same legs. What ovals are meant to do is to reduce the effective gear size in the dead spot. This means that the smaller muscles that you're using to get the crank through the dead spot have an easier job to do, and therefore less fatigue. The oval still pulls the same amount of chain through the dead spot as a round chainring. Oval is just marketing smoke and mirrors also known and blatant lies dressed up as science Firozfx, Koos Likkewaan 2, FirstV8 and 1 other 3 1 Link to comment Share on other sites More sharing options...
swingTOpeddle Posted December 11, 2022 Share 2 hours ago, jcza said: 32 Chainring with 52 cassette? Are you riding in the Alps? Get a 34 ring. Shouldn’t it be based on a rider’s ability? Or would you suggest this for a 200 FTP person who’s 120kg also? Link to comment Share on other sites More sharing options...
guidodg Posted December 11, 2022 Share biggest difference for me on an MTB with an oval 32T is when doing a steep technical climb on loose terrain the power is transmitted more linearly and there is far less loss of traction...try it to see Lukas Ferreira, love2fly, eala and 1 other 3 1 Link to comment Share on other sites More sharing options...
DieselnDust Posted December 12, 2022 Share 12 hours ago, guidodg said: biggest difference for me on an MTB with an oval 32T is when doing a steep technical climb on loose terrain the power is transmitted more linearly and there is far less loss of traction...try it to see That is very likely dependent on the amount of anti squat in the suspension. As the high spot and low spot on the chainring will alter the anti squat as the chain tension line of action changes. IME it reduces traction when I need it as the AS built into my bike is high. Newer bikes with lower AS may be less affected. Lukas Ferreira 1 Link to comment Share on other sites More sharing options...
jcza Posted December 12, 2022 Share 19 hours ago, swingTOpeddle said: Shouldn’t it be based on a rider’s ability? Or would you suggest this for a 200 FTP person who’s 120kg also? Comfortable shoes and you will walk at the same pace Lukas Ferreira, swingTOpeddle, Frosty and 1 other 1 2 1 Link to comment Share on other sites More sharing options...
Jewbacca Posted December 12, 2022 Share I reckon, without trying to break the internet, that one could look at it this way... IF the oval is just marketing hogwash, is it WORSE that a round one? If not, then who cares? It retains the chain and moves the back wheel. The truth is, most people aren't remotely close enough power/fitness wise to eke out the 2% gains advertised as that 2% probably only happens at a w/kg avg way higher than most put out. It's the perceived differences and preferences that people buy into. Like EZ grips. They are actually junk but people swear they are THE best grip out there. Much like 32 vs 34... there is very little difference to the average cyclist as they will just adjust how they ride and their cadence to their gearing, not the other way round. If you're asking a public forum these questions, you are likely still nowhere near a finished product as a cyclist so if you go 32 you will likely develop slightly faster leg speed on the flats and if you go 34 you will likely start to become a top end grinder on steep climbs. Realistically though it's trivial and doesn't matter peetwindhoek, DieselnDust, Frosty and 6 others 8 1 Link to comment Share on other sites More sharing options...
DieselnDust Posted December 12, 2022 Share <dashes to keyboard to google EZ grips> peetwindhoek and Jewbacca 2 Link to comment Share on other sites More sharing options...
dave303e Posted December 12, 2022 Share also horses for courses, at 4w/kg I am happy with a 38tooth for my day to day riding, because the area around the farm is so flat you can watch your dog run away for days. But I do have a 34 and 36 and swap them out when I know I will need them depending on where I am going to ride. We did the same with enduro motorbikes, over gear for XC/harescramble and then shorten the gearing up for technical events Frosty and Lukas Ferreira 1 1 Link to comment Share on other sites More sharing options...
117 Posted December 12, 2022 Share 23 hours ago, madmarc said: and analyzing my gear use on AXS app Would you mind directing me to where I can get the same from my AXS app? Does it matter that I run a GX AXS? TheoG 1 Link to comment Share on other sites More sharing options...
Wyatt Earp Posted December 12, 2022 Share On 12/10/2022 at 6:20 PM, Lukas Ferreira said: Hallo i'm a novice on the mtb and I'm busy building a bike. What chainring is a beter all round for doing some weekend trails 34T or 36T? I'll be pairing it with a 10 -52 cassette These are hard questions to answer without knowing the terrain you will be riding. But as a novice my advice would be to put on a 32. You will definitely be spinning out on the downhills, but then again leave that to the guys who feel they are winning the Epic. You will be running the 10 as you say, even then it’s not an easy gear to spin out (there are guys who grind and think they are moving quick, but they normally get left behind) Cadence is your friend, it’s not about ego and about who can turn the biggest gear, it’s about moving forward efficiently with the least impact on muscle fatigue. Thats why people pull out of races like Attakwas, they would rather blame the heat than admit they went way too hard in the beginning with a gear their legs couldn’t really handle. Lukas Ferreira, Jewbacca, DieselnDust and 2 others 5 Link to comment Share on other sites More sharing options...
100Tours Posted December 12, 2022 Share 20 hours ago, DieselnDust said: The oval still pulls the same amount of chain through the dead spot as a round chainring. That doesn't seem accurate? if you draw a straight line between 2 non-adjacent teeth on a chainring then that would be a shorter distance than the line drawn along the curve. So you would pull less chain for the same leg movement through the part of the stroke where the teeth on the oval ring lie inside of the teeth on a circular ring. Not commenting on the marketing hype, but your geometry argument is wrong. Lukas Ferreira 1 Link to comment Share on other sites More sharing options...
madmarc Posted December 12, 2022 Share 29 minutes ago, 117 said: Would you mind directing me to where I can get the same from my AXS app? Does it matter that I run a GX AXS? You can download it from App store and Google play store It works on all SRAM AXS models I run GX Eagle - its also used to set up your drive train RD Micro adjustment Configure how you want your shifter buttons to work. Battery level Firmware updates BTW i have the AXS connected to my Garmin 520 as well - tells me what gear im in and warns me if the battery is low. Every ride uploads to the app like Strava but gives you some analytics of drive train / rider / Route map etc etc - for me it's actually gives better info than the STRAVA free subscription Component summary from Northern Farms Another from Modders SBR on the 34T chainring SBR on the 32T chainring - I hadn't changed the 34 to 32 in the app but it makes no difference when reviewing the time in each gear. swingTOpeddle 1 Link to comment Share on other sites More sharing options...
117 Posted December 12, 2022 Share Thanks Mm. I have the app already, and used it to do some set up work etc. I'll fiddle with it this evening and see what I can extract TheoG and NotSoBigBen 2 Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now