Replacing a rear derailleur hanger is a fit-specific purchase, and two seemingly identical cycling accessories can make the decision needlessly complicated. Here, both Cycling Outdoor Sports Rear Mech Hanger Rear Hanger About 40g Accessories options target the same Scott #277544 Addict RC 2020 SC-R-SW1-S standard-mount dropout application. Their stated construction, color, weight, and part type also align. That makes the listed price the useful deciding point.
Quick verdict
Choose the USD 17.45 Rear Mech Hanger when the goal is the same stated replacement specification at the lower listed price. The USD 21.01 version remains a like-for-like option for the same named Scott application, but its stated details do not create a different use case. The absolute listed-price spread is $3.56.
Compact comparison
| Detail | Rear Mech Hanger - USD 17.45 | Rear Mech Hanger - USD 21.01 |
|---|---|---|
| Listed price | USD 17.45 | USD 21.01 |
| Part type | Bike rear derailleur hanger | Bike rear derailleur hanger |
| Color and material | Black aluminum alloy | Black aluminum alloy |
| Named application | Scott #277544 Addict RC 2020 SC-R-SW1-S | Scott #277544 Addict RC 2020 SC-R-SW1-S |
| Weight | About 40g | About 40g |
Where each product wins
Rear Mech Hanger - USD 17.45 is the clearer pick for a shopper whose priority is listed price. It retains the same stated black aluminum-alloy construction and approximately 40g weight while sitting at the lower end of this two-item comparison.
Rear Mech Hanger - USD 21.01 fits the same focused replacement scenario: a bike needing the named Scott #277544 Addict RC 2020 SC-R-SW1-S rear derailleur hanger application. It is not positioned as a broader accessory choice; it is a specific hanger replacement with the same stated part type as the lower-priced version.
Product notes
Rear Mech Hanger - USD 17.45
This is the natural choice for a rider seeking the named rear derailleur hanger application while keeping the listed cost lower. The black aluminum-alloy hanger is stated for Scott #277544 Addict RC 2020 SC-R-SW1-S bikes with a standard-mount dropout, making it relevant when that precise replacement designation is the task at hand. Its approximately 40g stated weight also keeps the focus on a compact replacement component rather than a large accessory.
Its limitation is the narrowly defined configuration. The listed finish is black, and the package contains one bike rear derailleur hanger. For the stated Scott application, that focused format is exactly the point; for a shopper looking for a multipurpose cycling add-on, it is not the same kind of purchase.
Rear Mech Hanger - USD 21.01
The USD 21.01 Rear Mech Hanger suits the same replacement need: a black, aluminum-alloy bike rear derailleur hanger stated for the Scott #277544 Addict RC 2020 SC-R-SW1-S application. It also carries the same approximately 40g specification and single-hanger package format. Choose this version when it is the listed option you have selected for that exact named bicycle setup.
The trade-off is straightforward: it has the higher listed price in this comparison. Its stated color, material, part type, named application, and weight align with the USD 17.45 version, so those shared characteristics do not provide a different practical reason to pay more. It remains a direct replacement-oriented choice, not a separate feature tier.
Final choice by use case
For the same stated Scott #277544 Addict RC 2020 replacement application, choose the lower-priced Rear Mech Hanger. Pick the USD 21.01 version only when that is the specific listed option you intend to use; its stated specifications match rather than expand on the lower-priced alternative.
