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expiredRobN3935 posted Jul 17, 2023 11:04 PM
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expiredRobN3935 posted Jul 17, 2023 11:04 PM

Shimano Ultegra FD-R8150 Di2 12-Speed Front Bike Derailleur

+ Free Shipping

$130

$260

50% off
REI
38 Comments 77,274 Views
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Deal Details
REI has Shimano Ultegra FD-R8150 Di2 12-Speed Front Derailleur on sale for $129.99 (discount will display in cart). Shipping is free or select free store pickup where available.

Thanks to community member RobN3935 for sharing this deal.

Note, Co-op members may earn a $20 bonus card when you make a $100 purchase thru July 24, 2023 (more information).

Features:
  • Combines the Di2 platform and the road incarnation of HYPERGLIDE+
  • Offers 45% faster shifting than the Dura-Ace FD-R9150 Di2 front derailleur
  • Smaller, sleeker and lighter than previous models: frontal area reduced by 33% and weight cut to 116 g
  • Top gear teeth capacity: 50–54T

Editor's Notes

Written by qwikwit | Staff

Original Post

Written by RobN3935
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
REI has Shimano Ultegra FD-R8150 Di2 12-Speed Front Derailleur on sale for $129.99 (discount will display in cart). Shipping is free or select free store pickup where available.

Thanks to community member RobN3935 for sharing this deal.

Note, Co-op members may earn a $20 bonus card when you make a $100 purchase thru July 24, 2023 (more information).

Features:
  • Combines the Di2 platform and the road incarnation of HYPERGLIDE+
  • Offers 45% faster shifting than the Dura-Ace FD-R9150 Di2 front derailleur
  • Smaller, sleeker and lighter than previous models: frontal area reduced by 33% and weight cut to 116 g
  • Top gear teeth capacity: 50–54T

Editor's Notes

Written by qwikwit | Staff

Original Post

Written by RobN3935

Community Voting

Deal Score
+37
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Top Comments

jeff34270
18071 Posts
5620 Reputation
This derailleur is specifically for a 2x12 electronic shifting set up.
If you have more or less than 2 chainrings in the front, it won't work.
If you have more or less than 12 cogs in the back, it won't work.
If you don't have Di2 shift levers, it won't work.
wayneIII
32 Posts
18 Reputation
yes its compatible, but honestly no need to upgrade they are nearly identical...
jnyip
881 Posts
129 Reputation
The GT is probably a MTB with 8 speed mechanical group, this is a 12 speed electronic derailleur for road bikes, so no, it wouldn't be compatible. Even if it was, it wouldn't be worth upgrading the GT frame.

37 Comments

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Jul 18, 2023 01:26 PM
126 Posts
Joined Jul 2017
0rbitalframeJul 18, 2023 01:26 PM
126 Posts
Wonder if this is compatible with my 105 12 speed di2?
Jul 18, 2023 02:41 PM
32 Posts
Joined Mar 2015
wayneIIIJul 18, 2023 02:41 PM
32 Posts
Quote from 0rbitalframe :
Wonder if this is compatible with my 105 12 speed di2?
yes its compatible, but honestly no need to upgrade they are nearly identical...
Jul 18, 2023 02:42 PM
1,042 Posts
Joined Apr 2014
rypajoJul 18, 2023 02:42 PM
1,042 Posts
Quote from 0rbitalframe :
Wonder if this is compatible with my 105 12 speed di2?
Looks like you are good to go https://www.reddit.com/r/cycling/...atibility/
Jul 18, 2023 02:43 PM
370 Posts
Joined Sep 2009
celcelcelJul 18, 2023 02:43 PM
370 Posts
Quote from 0rbitalframe :
Wonder if this is compatible with my 105 12 speed di2?
Planning to do the same thing.
1
Jul 18, 2023 02:53 PM
6 Posts
Joined Nov 2014
b3d3g1Jul 18, 2023 02:53 PM
6 Posts
The 12 speed Ultegra cassette is also 50% off
https://www.rei.com/product/19509...1950930002
Pro
Jul 18, 2023 04:46 PM
1,959 Posts
Joined Sep 2012
McWetty
Pro
Jul 18, 2023 04:46 PM
1,959 Posts
Biking newb here… bought a GT Aggressor from Dicks for cheap. The parts on the bike are expectedly cheap. Would this be compatible and would it a good upgrade?
1
3
Jul 18, 2023 04:51 PM
43 Posts
Joined Mar 2020
StrongTerrier7586Jul 18, 2023 04:51 PM
43 Posts
Quote from b3d3g1 :
The 12 speed Ultegra cassette is also 50% off
https://www.rei.com/product/19509...1950930002
Great deal

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Jul 18, 2023 04:51 PM
272 Posts
Joined Jul 2009
thegoodwordJul 18, 2023 04:51 PM
272 Posts
Quote from McWetty :
Biking newb here… bought a GT Aggressor from Dicks for cheap. The parts on the bike are expectedly cheap. Would this be compatible and would it a good upgrade?
Without knowing the component spec on your Aggressor, that question is hard to answer. Most likely you have a cable actuated shifting mech, so this electronic shifting would not be compatible without a new shifter. This derailleur is found on high end bikes. Ride what you have and then replace parts as they wear out or break.
Jul 18, 2023 04:51 PM
240 Posts
Joined May 2009
tallassmikeJul 18, 2023 04:51 PM
240 Posts
Quote from McWetty :
Biking newb here… bought a GT Aggressor from Dicks for cheap. The parts on the bike are expectedly cheap. Would this be compatible and would it a good upgrade?
If the bike frame isn't di2 ready. Then it won't look pretty trying to make the electronic wires work. Usually a mess.

Also cheap bikes have more issues then just cheap parts. You're better off buying a $1500+ bike and upgrading parts once they wear down
1
Expert
This user is an Expert in Home & Home Improvement
Jul 18, 2023 04:56 PM
18,071 Posts
Joined Jun 2012
jeff34270
Expert
This user is an Expert in Home & Home Improvement
Jul 18, 2023 04:56 PM
18,071 Posts
This derailleur is specifically for a 2x12 electronic shifting set up.
If you have more or less than 2 chainrings in the front, it won't work.
If you have more or less than 12 cogs in the back, it won't work.
If you don't have Di2 shift levers, it won't work.
Jul 18, 2023 04:57 PM
881 Posts
Joined Sep 2016
jnyipJul 18, 2023 04:57 PM
881 Posts
Quote from McWetty :
Biking newb here… bought a GT Aggressor from Dicks for cheap. The parts on the bike are expectedly cheap. Would this be compatible and would it a good upgrade?
The GT is probably a MTB with 8 speed mechanical group, this is a 12 speed electronic derailleur for road bikes, so no, it wouldn't be compatible. Even if it was, it wouldn't be worth upgrading the GT frame.
Jul 18, 2023 05:10 PM
458 Posts
Joined Apr 2020
FantasticBike3156Jul 18, 2023 05:10 PM
458 Posts
The $100 spd-sl pedals are half off too. Going to pick up a set for planned new bike purchase.
Expert
This user is an Expert in Home & Home Improvement
Jul 18, 2023 05:15 PM
18,071 Posts
Joined Jun 2012
jeff34270
Expert
This user is an Expert in Home & Home Improvement
Jul 18, 2023 05:15 PM
18,071 Posts
If you skim through the previous REI 11-speed cassette discussion, you'll see many other Shimano products (pedals, various speed cassettes, derailleurs, etc.) that are 50% off.

https://slickdeals.net/f/16800929-shimano-11-speed-ultegra-11-32-47-and-11-28-44-on-sale-at-rei
Jul 18, 2023 05:17 PM
550 Posts
Joined May 2013
polyspecificJul 18, 2023 05:17 PM
550 Posts
Quote from McWetty :
Biking newb here… bought a GT Aggressor from Dicks for cheap. The parts on the bike are expectedly cheap. Would this be compatible and would it a good upgrade?
You want to.do.whatever you can to get rid of the front derailleur.on a mountain bike. You do not want this.
3

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Jul 18, 2023 05:20 PM
5 Posts
Joined Jul 2023
BehemothRiderJul 18, 2023 05:20 PM
5 Posts
I'm out of the loop, wireless has worked its way down to 105... Funny how they just sort of keep rebranding and slightly changing the previous version of Dura-Ace as Ultegra whenever they come out with something new. In that case a slightly dated Ultegra component should be loosely comparable to a current 105. I think we are at the point where a modern big box store bike if properly assembled might actually almost be comparable to a midrange bike shop bike from a decade ago. I wonder where we will be in another decade. Wireless hub motors with integrated (much more compact) batteries would be amazing, Imagine simply swapping a wheel and adding a throttle to temporarily electrify the race bike! As these things progress please be aware of some of the "right to repair" things going on right now as there are instances where your property becomes trash because the "cloud" disappears, check this video to see what I'm talking about. https://youtu.be/UMSIdqdIldw . It is advisable to avoid purchasing products that require the internet to work and the supplier to give authorization for their use.
4

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