In this occasion I share with you my experience changing my crankset from a Praxis Works ALBA 170 mm. to a Shimano 105 160 mm. In hope to relief my knee pain on the long trips I pulled the trigger.
Great video. Love the fact that you put in problems you faced and the solutions. One error I noticed was that you put in the Shimano crank arm fixing bolt AFTER you tightened the crank cinch bolts. The fixing bolt should go in FIRST, since it's purpose is to set the correct side load (preload) for the cranset against the bottom bracket bearings. I believe the torque is very low for this, around 1Nm, which is why it is made of plastic!! Hope this helps. Keep up the good work :)
Hi there! thank you very much for your kind words and for your correction. Being a plastic piece I never thought it was going to have a big impact. Thank you a lot! I will do it correctly next time.
@@YuichiTamaki You are most welcome. BTW. I think it would be great if you made an update video outling your longterm experience on riding with shorter cranks, both good and bad. I'm sure alot of peole would love to hear from you:) Keep up the great work 👍👍👍👍👍👍👍
Hi, i did this change about 2 months ago(172mm-160mm) I have short legs and most of the calculators online give me 162mm, so i bought the 160mm version. It takes some getting used to but i am happy with it. It feels smoother to pedal and smaller chance to pedal strike at corners. Dont se any downsides to change to shorter cranks...most of the people ride with too long cranks for their body propotions.
Hello there! Recently I did a 80K ride. Half of that with an elevation gain of 4600 meters. In the past my knees would die. But this time they hold well until the end. If you have knee problems I suggest you do the upgrade. Another important note is that with a gearing of 34 front/34 Rear I didn't feel a torque loss. Hope it helped! And thank you very much!
Thank you! I will go ahead and order a 105 crankset now! Ive been thinking about it for quite some time. APPRECIATE the reply. Have a blessed day Tamaki san :)
Changed mine last year from 170 to 165. Because i had to higher my cadance a bit i was feeling that i “missed” some gears on my cassette. Therefore i changed my front chainrings to a size smaller. The result less muscle fatigue and much more energy on higher distances (150-300km)
Hello there! Thank you for commenting! I rode long enough to tell you that it really made a change. I don't have that sharp pain in the knee caps anymore. I think it is a great upgrade especially if you feel any pain. Apart from that also you feel the rotation of the crank is a little bit smoother. Please if you have more questions feel free to ask!
Thank you very much! I am at the short side 165 cm. Or around 5'5". My bike is size 52 (a little bit over sized for me) but I made it work with a different seatpost and those cranks.
Thank you very much! I found 165mm. in AliExpress, but I was afraid that the 5 mm. difference was going to be imperceptible. So I opted for the 160 mm. crank. I bought it at Amazon Japan. They are costing around 120 USD which I find reasonable.
Hello, thank you very much! Regarding if you should get 165 or 160 it depends on how performance oriented you are. In my case I just took the "It doesn't hurt anymore" approach and went for the 160 cm. To feel real difference (comfort is more important for me). My bike is size 52. My height is 163 cm. And inseam 69 cm. On paper that bike is too big for me but I made it "fit" with a zero offset seatpost. Another thing to have in consideration is that even a bike with the same size number could have a completely different overall size in real life. That's why I don't trust manufacturers sizing charts. Hope it was a little helpful! Good luck!
Thanks alot for your feedback. Wow you are on size 52 . But it makes sense when U have 0 offset seatpost + shorter stem. I'm 168 . inseams 72cm. My bike size is size 49. I used to have 165mm cranks on my old bike(size49) but for the new bike I tried 170mm but I think Im struggling with it recently (more hip flexor ,quad and hamstrings strains when I train harder ). I'm not flexible & have hip impingement. Also I find to have problems with my top strokes 😢 So now I'm thinking 165mm or 160mm (to reduce my hip angles) -hmmm such difficult decisions😅
@@joeblack3345 jajaj difficult indeed. Well since you are also on the shorter side I would go 160 mm. because remember that there are many 190 cm. tall riders using 170 mm. So there is no surprise we can do better with 160 mm. May I ask you what bike do you have? I would like to compare the geo at bikeinsights.com
@@YuichiTamaki my old bike is specialized Roubaix (endurance bike) . Size 49. 165mm cranks . Standard 80mm stem futureshok My new bike (racebike) - dogma F size 465 -stem 90mm. I have done bike fit with 170mm cranks (I thought I could adapt the 5mm but it seems like it is harder than thought)😢
@@joeblack3345 Great bikes! Funnily enough when I compare the Geo of my 2020 size 52 Roubaix with the old 49 Roubaix the reach only changes 1 mm. Basically what you lose in a bigger frame size is seatpost exposure which affects compliance. The Dogma F is totally different. I am amazed how aggressive that posture looks. Even if the Roubaix is an endurance bike it is aggressive enough for me. I say go for the 160 mm. They are pretty desirable so selling them in the worst case should be easy.
Hello! It is not common indeed. I bought it at Amazon Japan, I couldn't even find it on AliExpress. I'm not an expert by any means but it should fit you. Bike fitters say standard cranks could fit 190 cm. guys and up. So going shorter should not do any harm.
why not go for clipless pedals? that will bring more profit. knees always suffer on flat pedals on long rides difference for only 2,5mm is really felt if you are trained enough
Hello! thanks for commenting. While clipless is undeniably a more efficient in certain conditions. In my daily life I ride a lot through the city in high traffic and pedestrians area. Sometimes I also have to climb long stairs. In that case I prefer the convenience of flats. Maybe I should have a pair of clipless for my long distances journeys.
@@YuichiTamaki in your situation you have to choose mtb clipless pedals with small cleats. shoes for mtb cleats are like normal shoes and alow to walk and climb like in normal shoes
