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Other Resources => Maintenance, Mechanics, & Tools => Topic started by: crazyravr on December 10, 2025, 08:32:21 AM

Title: Ultegra OSPW on 105 mech?
Post by: crazyravr on December 10, 2025, 08:32:21 AM
So I accidentally bought the OWSP from Ryet that was under Ultegra. Is it possible to install this on a 105 (which is what I have) or is this a completely different unit?
Title: Re: Ultegra OSPW on 105 mech?
Post by: jonathanf2 on December 10, 2025, 09:35:26 AM
Quote from: crazyravr on December 10, 2025, 08:32:21 AM
So I accidentally bought the OWSP from Ryet that was under Ultegra. Is it possible to install this on a 105 (which is what I have) or is this a completely different unit?

It won't fit. The Ultegra interface section is slightly wider/beefier in diameter compared to 105.
Title: Re: Ultegra OSPW on 105 mech?
Post by: alfiomotrambo on December 12, 2025, 05:13:43 AM
Quote from: crazyravr on December 10, 2025, 08:32:21 AM
So I accidentally bought the OWSP from Ryet that was under Ultegra. Is it possible to install this on a 105 (which is what I have) or is this a completely different unit?


You need to buy the R7000 version https://it.aliexpress.com/item/1005008224723774.html (https://s.click.aliexpress.com/e/_c317eWGd)
Title: Re: Ultegra OSPW on 105 mech?
Post by: crazyravr on December 12, 2025, 08:25:39 AM
Yeap. Returned what I bought and bought the proper 105. Alternative was to buy an Ultegra groupset, but wife said no lol :)
https://www.aliexpress.com/item/1005004994843543.html
Title: Re: Ultegra OSPW on 105 mech?
Post by: Lotnik on December 18, 2025, 03:49:10 AM
Just send it back, it's a crap. Sander2177 had two and both got damaged.
Title: Re: Ultegra OSPW on 105 mech?
Post by: Dan S. on December 18, 2025, 04:24:52 AM
Quote from: Lotnik on December 18, 2025, 03:49:10 AM
Just send it back, it's a crap. Sander2177 had two and both got damaged.

Oh yea? @Dovh and I are both using the 105 Di2 version and it’s been rock solid. What happened?
Title: Re: Ultegra OSPW on 105 mech?
Post by: Lotnik on December 18, 2025, 07:41:51 AM
Quote from: Dan S. on December 18, 2025, 04:24:52 AM
Oh yea? @Dovh and I are both using the 105 Di2 version and it’s been rock solid. What happened?
If I remember good one lost bolts during the ride and lost pulley wheel, second got loose on the mount to the derailleur after few rides too.