This is a Replacement Stair Arm Wheel with Bearings Part Number 48337101 That fits Many Precor Models Listed Below.

Precor-
5.17 (4E)
5.17i (AMPF)
5.17i (SB)
5.19 (APLK)
5.19 (QY, SJ)
5.21 (2R)
5.21 240V ELLIPTICAL TRAINER (3P)
5.21i (A998)
5.21i (F8)
5.21i (SS)
5.23 (ADFP)
5.23 (AEXJ)
5.23 (SK)
5.23 120V L1-20 - Stone Gray (AA55)
5.25 (AEXP)
5.31 (AMWE)
5.31 240V (AJNX)
5.33 (AAAB)
5.33 (ADFJ)
5.33 (ATRR)
5.33 (ST)
5.35 (AXGR)
5.35 240V (AMWX)
5.37 (ATWE)
5.37 (AXJE)
5.37 (AYYR)
C524 (K7)
C524 (SW, SX)
C524i (A928)
C532 (64, CF)
C532I (A888)
C532i (AJNG)
C532i (AMWY)
C534 (W1, W2)
C534i (AA93)
C534i (ATTB)
C536i (AEZC)
C536i (AEZC, AGMC, AJTK)
C536i (AGMC)
C536i (AJTK)
C556i Navy (ATRT)
Crosstrainer - EFX 5.23 BOM SK
EFX - 5.23 - Stone Gray (AA23)
EFX 5.19 - STONE GRAY (AACL)
EFX 5.19 - STONE GRAY (ATPL)
EFX 5.21si 120V - 5.21si - Rev. J 05-29-01 (5F)
EFX 5.31 RETAIL 120V - EFX 5.31 ALPINE (AJNF)
EFX 5.33 Retail 120V - EFX 5.33 - Stone Gray (AXFL)
EFX 5.33 RETAIL 120V - EFX 5.33 ALPINE (AMWF)
EFX 5.33 Retail 120V ENG - EFX 5.33 (CR)
EFX 5.33 Retail 120V T3 - EFX 5.33 (00ST)
EFX 5.33 RETAIL 120V T3 B-UNIT - EFX 5.33 (A999)
EFX 5.35 RETAIL 120V - EFX 5.35 ALPINE (A924)
EFX 5.37 RETAIL 120V - EFX 5.37 ALPINE (AA97)
EFX 524I STND COMML HHHR HEADLESS S (AXGP)
EFX 532 120V Assembled - EFX 532 (CF)
EFX 532 120V Chinese - EFX 532 (CT)
EFX 532 120V German - EFX 532 (CV)
EFX 532 120V Japanese - EFX 532 (CS)
EFX 532 120V Spanish (CY)
EFX 532 240V - EFX 532 (AU)
EFX 532 240V Chinese - EFX 532 (CU)
EFX 532 240V German - EFX 532 (CW)
EFX 532 Commercial 120V (64)
EFX 534i STND HHHR HE - Titanium (AADN)
EFX 534I, STND COMML, HHHR, HEADLES (AYYP)
EFX C524 LT Commercial Assembled - C524 (LH)
EFX C524 LT Commercial C3/T3 HEA - C524 (00KZ)
EFX C524 LT Commercial ENG - C54 (I7)
EFX C524 LT Commercial T3 - C524 (00SW)
EFX C524 LT Commercial T3 - C524 (HEADLE (AEWB)
EFX C524 LT Commercial T3 ASSEMB - C524 (00SX)
EFX C524i LT Commercial - C524i - Stone Gray (AXFG)
EFX C524i LT Commercial L1-20 ST - C524i (AMTA)
EFX C524i LT Commercial L1-20 ST - C524i (ATRC)
EFX C524i LT Commercial L1-20 ST - C524i (AYYC)
EFX C524i, LT Commercial L1-20 ST - C524i (AXGC)
EFX C524i-T3 LT Commercial - C524i (ADEC)
EFX C524i-T3 LT Commercial - C524i - Stone (AAAE)
EFX C524i-T3 LT Commercial - C524i - Stone (AEWC)
EFX C534 LT Commercial Assembled - C534 (LG)
EFX C534 LT Commercial C3/T3 HEA - C534 (00JD)
EFX C534 LT Commercial ENG - C534 (I6)
EFX C534 LT Commercial T3 (ADEB)
EFX C534-T3 LT Commercial - C534 (00W1)
EFX C534-T3 LT Commercial Assembl - C534 (00W2)
EFX C534-T3 LT Commercial B-Unit - C534 (AYXL)
EFX C534I-T3 LT Clmmercial - C534i - Stone (A995)
EFX C534i-T3 LT Commercial - C534i - Stone (AJKK)
EFX C534i-T3 LT Commercial - C534i - Stone (AMPK)
EFX C534II-T3 LT Commercial - C534i - Stone (AGJC)
EFX400-14 Fixed Arms Crossramp
EFX400-14 MOVING ARMS - Rev. A01 (A758)
EFX5.17 Retail 120V B-Unit (IJ)
EFX5.17i - Stone Gray (AA84)
EFX5.17I - Stone Gray (AJKW)
EFX5.17I Retail 120V Eng (00SB)
EFX5.17I Retail 120V Eng Assemb (00SH)
EFX5.17I Retail 120V Eng B-Unit (00YG)
EFX5.19 Retail 120V Eng (00QY)
EFX5.19 Retail 120V Eng Assembl (00SJ)
EFX5.19 Retail 120V Eng B-Unit (00Y3)
EFX5.21I - Stone Gray (AA35)
EFX5.21I - Stone Gray (ADFF)
EFX5.21i Retail 120V TD (00SS)
EFX5.21Si Retail 120V B-Unit (GQ)
EFX5.21Si Retail 240V (5G)
EFX5.23 - Stone Gray (AAAM)
EFX5.23 - Stone Gray (AMPW)
EFX5.23 Retail 120V Eng (DF)
EFX5.23 Retail 120V Eng (Q6)
EFX5.23 Retail 120V Eng Assembl (Q1)
EFX5.23 Retail 120V L1-20 - Stone Gray (AJLN)
EFX5.23 Retail 120V T3 (00SK)
EFX5.23 Retail 120V T3 Assemble (00YM)
EFX5.23 Retail 120V T3 B-Unit (00YH)
EFX5.23,Retail 120V L1-20 - Stone Gray (AABH)
EFX5.33 Retail 120V - EFX 5.33 - Stone Gray (AEXF)
EFX532 120V B-UNIT - EFX 532 (KH)
EFX532 240V Spanish - EFX 532 (CZ)
EFX534I - Titanium (AMWG)