170mm in front? (Rise)

Gardcol

Member
Dec 30, 2020
61
71
Aberdeen
I have the 36 on my M10 and checked with Orbea before bumping it up to 160mm. Orbea UK rep confirmed that would not void the warranty. This slackened HTA by 0.5deg. I have also added offset bushings so now at 64deg and feels good. I think 170mm may affect warranty but you need to check through your local Orbea dealer.
 

Rod B.

Well-known member
Aug 18, 2021
530
924
USA, Orange County Ca.
Michel,

I just came across your post regarding changing the front travel on your Rise to 170mm. I increased the fork travel on my Rise to 160mm. This improved the bike's handling and mostly eliminated pedal strikes in all but the most rocky terrain. I noted the following when I increased travel. I lost a very slight amount of nimbleness on tight sections of trail. I noticed no loss of handling on flat and fast flowy sections. It greatly improved handling in technical rocky sections, drops and steep downhill sections.

Note: Increasing my Rise's travel to 160mm on my Fox 36 (Change the air shaft assembly), increased the fork's length to the maximum allowed fork length specified by Orbea.

If you are not aware, Orbea's Rise Blue Paper (Owner's Manuel) specifies the maximum length of the fork you can use on your Rise. The maximum length is specified as 561mm (22.086 inches.) The fork length measurement is taken from the center of the front axle to the top of the crown, i.e. where the fork meets the bottom of the head tube. I've attached parts of the manual which specifically deal with fork travel.

If anybody has any questions on how to go about changing the travel on their Fox 36, shoot me a message.

Screenshot 2021-12-15 05.40.16_LI.jpg


Screenshot 2021-12-15 05.37.33_LI.jpg
 

Gismo6303

Member
Sep 4, 2021
67
13
France
Michel,

I just came across your post regarding changing the front travel on your Rise to 170mm. I increased the fork travel on my Rise to 160mm. This improved the bike's handling and mostly eliminated pedal strikes in all but the most rocky terrain. I noted the following when I increased travel. I lost a very slight amount of nimbleness on tight sections of trail. I noticed no loss of handling on flat and fast flowy sections. It greatly improved handling in technical rocky sections, drops and steep downhill sections.

Note: Increasing my Rise's travel to 160mm on my Fox 36 (Change the air shaft assembly), increased the fork's length to the maximum allowed fork length specified by Orbea.

If you are not aware, Orbea's Rise Blue Paper (Owner's Manuel) specifies the maximum length of the fork you can use on your Rise. The maximum length is specified as 561mm (22.086 inches.) The fork length measurement is taken from the center of the front axle to the top of the crown, i.e. where the fork meets the bottom of the head tube. I've attached parts of the manual which specifically deal with fork travel.

If anybody has any questions on how to go about changing the travel on their Fox 36, shoot me a message.

View attachment 78208

View attachment 78209

Hi, I've the M10, with the fox 36 150mm, I've take the measurements, the fork is about 561mm length, so if I refer to the bluepaper I can't put a 160mm air shaft in it.
 

Rod B.

Well-known member
Aug 18, 2021
530
924
USA, Orange County Ca.
Gismo6303,

I'm currently running a 2019 Fox 36 FIT4 on my Rise M20 The 2019 Fox 36 center axle to crown measurement is slightly shorter than the 2021 Fox 36. I've attached Fox 36 specification drawings for the 2019 and 2021 Fox 36 models for your review.

For the years 2016 thru 2020, Fox gives the Fox 36mm a fully extended center axle to crown measurement length of 567.10mm. Fox also lists a manufacturing variance of plus/minus 5.0mm in length. This means the fork may possibly measure a minimum of 562.1mm and a maximum of 572.1mm. When I measure my 2019 fork, I happen to get a measurement of 561mm.

In regards to your fork:
For the year 2021, Fox lists the Fox 36, 150mm travel as having a fully extended, center axle to crown measurement length of 561.00mm. Fox lists a manufacturing variance of plus/minus 5.00mm in length. This means the 150mm fork may measure a minimum of 556.00mm and a maximum of 567.00mm. For 160mm travel, Fox gives a fully extended, center axle to crown measurement length of 571.00mm. Fox also lists a manufacturing variance of plus/minus 5.00mm in length. This means the 160mm fork may measure a minimum of 566.00mm and a maximum of 576.00mm.

I have about 900 miles on my bike and ride it frequently on black and double black trails. I weigh 205 pounds. I don't jump my bike other than occasionally boosting the bike off a trail feature. I haven't had any issues with my bike or frame.

I'd install the 160 air shaft, check your measurements to see if it's close to within spec. I'm thinking that to be safe, Orbea fudges a little bit on the engineering head tube load tolerances. That's because mountain bikers are the kind of people if you tell them to take two pills, they'll take six. I think a few millimeters over the max isn't going to cause catastrophic frame failure. It's just my opinion and a judgement call you'll have to make.

2016-2020 Fox 36 Specification drawing and table of figures
Screenshot 2021-12-18 13.14.32.jpg


2021 Fox 36 Specification Drawing and table of figures
Screenshot 2021-12-18 13.07.44.jpg
 

Gismo6303

Member
Sep 4, 2021
67
13
France
Wow! You are an encyclopedia! Thx a lot for your answer. I'll keep with the 150mm one, I've order au pair of Merida 150mm crancks for reduce pedal strike and have better pedaling movements (i usually use 155mm one on my other bike). Pedal strike is the main reason for upgrade travel, the second is comfort.
 

Rod B.

Well-known member
Aug 18, 2021
530
924
USA, Orange County Ca.
I increased travel for the exact reason. I was pedal striking like crazy....According to my wife, my mind is for shit, definitely not an encyclopedia. Please let me know how the cranks work for you. I was thinking of dropping down a size from my Rise's 170mm cranks.

Be Safe,
Rod
 

Shjay

Well-known member
Apr 30, 2019
835
491
Kent
My manitou Mezzer Pro is 160mm, the axle to crown is 574mm according to Hayes! I am sure 10mm more travel is within tolerance, different forks have different axle to crown, I wouldn’t run 170mm anyway
 

Gismo6303

Member
Sep 4, 2021
67
13
France
I'm OK for the tolerance, but I don't have luck, so i don't play with it. For exemple v my rise has error code 5km after buying it, it take 4 weeks and 6 time back to dealer for solving the problem by changing the speed sensor...
 

Gismo6303

Member
Sep 4, 2021
67
13
France
Hi, it's look like the miranda are too large for fit. They have wider grooves than the e13 but there is the same amount on groves who bite on the axle. I cant put the m20 cap on the axle. I don't know what to do, I want shorter cranks, but don't want to damage the axle

IMG_20211223_182338.jpg


IMG_20211223_182400.jpg
 

Rod B.

Well-known member
Aug 18, 2021
530
924
USA, Orange County Ca.
Gismo,

I checked the Miranda website. Your crankset in the picture looks like the Delta LS crankset which is compatible with the Shimano E8000 motor, but is not compatible with Shimano's newer EP8 motor.

Unfortunately, I could not find any cranks arms which are shorter than 160mm and compatible with the EP8 motor. It looks like there are only two companies, Shimano and E13 which make crank arms for the EP8 motor. Both companies only offer crank arm in lengths 160mm thru 175mm. There are companies online which make custom crankarms.

I have no experience with Miranda crank arms. I wonder if it's possible to take the crank arms to a machine shop and have some of the thickness removed from the crank arm using a milling machine. On E-thirteen's website, they do offer for sale a long replacement crank arm fixing bolt as seen in the picture below. It may help with your issue.

Screenshot 2021-12-23 14.11.17.jpg
 

Mungalot

Member
Apr 5, 2021
35
11
Moon
What orbea bike?
Going too slack can void warranty on some bikes. Are you wanting it more slack? Are you needing more travel? I’d say 10mm more won’t effect anything.
No, if you want a bullit, then buy one. This bike is not intended for that.
 

Rod B.

Well-known member
Aug 18, 2021
530
924
USA, Orange County Ca.
Mungalot,

I try to not question why somebody wants to do something to their bike unless maybe it's unsafe. While you or I wouldn't put a heavy Fox 38 170mm travel fork on our bikes, I didn't comment on Michel wanting to do so. I don't know the area he/she rides, trail conditions, the person's financial situation, i.e. unable to buy a brand new, big travel eBike. It's his/her Rise to do with as they please and I chose to provide useful information to help the rider in making an informed decision.

One of things I love most about mountain biking is customizing my bikes. Fine tuning the ride so to speak. Leaving a bike bone stock....it ain't gonna happen.....The only original component on my Rise is the frame.

In regards to your comment......"It’s name is Rise. Not Descend for a reason."

Yes, the Rise does in fact Rise. But, it also descends sweetly on a 160mm travel fork. Here are some trails I've ridden in the last month on my Rise.

IMG_E5862.JPG


IMG_0552.JPG


IMG_0509a.jpg


IMG_0539a.jpg
 

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