FCS Fin Data

2023/2024 // Older Seasons // Specialty Series Fin Sizing

Essential Series Fins

	BASE ”	BASE MM	DEPTH ”	DEPTH MM	AREA ”	AREA MM	SWEEP DEG °	FOIL
REACTOR SML (SIDE)	4.22	107	4.41	112.0	14.45	9324	32.0	FLAT
REACTOR SML (CTR)	4.17	105.8	4.3	109.1	13.44	8672	31.0	50/50
REACTOR MED (SIDE)	4.33	110	4.53	115.0	15.23	9824	32.0	FLAT
REACTOR MED (CTR)	4.28	108.7	4.41	112.0	14.22	9172	31	50/50
REACTOR LRG (SIDE)	4.44	112.8	4.65	117.9	16.00	10324	32.0	FLAT
REACTOR LRG (CTR)	4.39	111.4	4.52	114.8	14.99	9672	31.0	50/50
PERFORMER XS	4.13	104.8	4.3	109.3	13.26	8554	33.7	IFT
PERFORMER SML	4.25	107.9	4.43	112.4	14.03	9054	33.7	IFT
PERFORMER MED	4.37	110.8	4.55	115.4	14.81	9554	33.7	IFT
PERFORMER LRG	4.48	113.7	4.67	118.4	15.58	10054	33.7	IFT
PERFORMER XL	4.59	116.5	4.78	121.4	16.36	10554	33.7	IFT
ACCELERATOR GROM	3.95	100.3	4.13	104.7	12.38	7895	33.7	FLAT
ACCELERATOR MED	4.39	111.5	4.58	116.3	15.28	9860	33.7	FLAT
ACCELERATOR LRG	4.50	114.3	4.70	119.2	16.06	10360	33.7	FLAT
CARVER MED	4.47	113.4	4.54	115.3	14.96	9650	37.0	FLAT
CARVER LRG	4.58	116.3	4.66	118.2	15.73	10150	37.0	FLAT
CARVER XL	4.69	119.0	4.77	121.0	16.51	10650	37.0	FLAT
REACTOR (Q-REAR) MED	4.03	102.2	4.40	111.8	12.63	8150	28.5	80/20
PERFORMER (Q-REAR) SML	3.83	97.2	3.99	101.3	11.08	7150	32.4	80/20
PERFORMER (Q-REAR) MED	4.09	103.7	4.26	108.1	12.63	8150	32.4	80/20
PERFORMER (Q-REAR) LRG	4.33	110.0	4.51	114.6	14.18	9150	32.4	80/20
CARVER (Q-REAR) SML	3.86	98.0	3.93	99.8	11.07	7140	33.2	50/50
CARVER (Q-REAR) MED	4.14	105.0	4.21	106.9	12.63	8150	33.2	50/50

H-Series Fins

	BASE ”	BASE MM	DEPTH ”	DEPTH MM	AREA ”	AREA MM	SWEEP DEG.	FOIL
H4 SML (CTR)	4.29	108.8	4.49	113.9	13.82	8917	37.2	50/50
H4 SML (SIDE)	4.36	110.6	4.34	110.1	14.29	9221	38.3	FLAT
H4 MED (CTR)	4.40	111.7	4.61	117.0	14.58	9405	37.2	50/50
H4 MED (SIDE)	4.48	113.6	4.45	113.0	15.07	9721	38.3	FLAT
H4 LRG (CTR)	4.52	114.6	4.73	120.0	15.33	9893	37.2	50/50
H4 LRG (SIDE)	4.59	116.5	4.57	115.9	15.84	10221	38.3	FLAT
H4 (Q-REAR)	4.09	103.7	4.24	107.5	12.62	8140	33.2	IFT-80/20

Athlete Series Fins

	BASE ”	BASE MM	DEPTH ”	DEPTH MM	AREA ”	AREA MM	SWEEP DEG.	FOIL
JW GROM	4.10	104.1	4.19	106.4	12.81	8264	35.8	FLAT/BEV
JW MED	4.46	113.1	4.56	115.6	15.13	9763	35.8	FLAT/BEV
JW LRG	4.57	116.0	4.67	118.6	15.91	10262	35.8	FLAT/BEV
FT MED	4.41	111.9	4.54	115.2	14.93	9634	34.8	FLAT/BEV
FT LRG	4.52	114.8	4.66	118.2	15.71	10134	34.8	FLAT/BEV
MF GROM	4.04	102.6	4.20	106.6	12.73	8215	36.0	FLAT/BEV
MF MED	4.35	110.3	4.50	114.3	14.62	9434	36.0	FLAT/BEV
MF LRG	4.49	114.0	4.67	118.5	15.70	10131	36.0	FLAT/BEV
KA GROM	4.15	105.3	4.18	106.0	12.52	8075	34.9	FLAT
KA SML	4.37	111.0	4.41	112.0	13.85	8934	35.1	FLAT
KA MED	4.53	115.0	4.53	115.0	14.73	9500	35.1	FLAT
KA LRG	4.67	118.5	4.70	119.3	15.84	10220	35.1	FLAT
SB SML	4.28	108.6	4.47	113.4	14.51	9360	33.7	FLAT
SF MED (SIDE)	4.40	111.7	4.55	115.5	15.17	9785	33.3	FLAT
SF MED (CTR)	4.29	109.0	4.50	114.1	14.06	9070	31.0	50/50

Shaper Series Fins

	BASE ”	BASE MM	DEPTH ”	DEPTH MM	AREA ”	AREA MM	SWEEP DEG.	FOIL
JS MED	4.53	115.0	4.53	115.0	15.08	9730	36.1	FLAT
JS LRG	4.61	117.0	4.65	118.0	15.81	10200	36.1	FLAT
DHD MED (Ctr)	4.30	109.3	4.46	113.4	14.25	9195	34.5	50/50
DHD MED (Side)	4.41	112.0	4.57	116.0	15.49	9994	35.4	80/20
DHD LRG (Ctr)	4.40	111.7	4.56	115.9	14.88	9601	34.5	50/50
DHD LRG (Side)	4.52	114.6	4.66	118.3	16.12	10400	35.4	80/20
HS MED	4.50	114.1	4.59	116.4	14.97	9656	31.8	CAMBERED
HS LRG	4.61	117.0	4.70	119.4	15.74	10158	31.8	CAMBERED
HS (Q-Rear)	4.14	105.0	4.21	106.9	12.63	8150	33.7	CAMBERED
PYZEL MED	4.53	115.0	4.61	117.0	15.21	9813	33.4	FLAT
PYZEL LRG	4.65	118.1	4.73	120.1	16.04	10350	33.5	FLAT
MB SML	4.19	106.3	4.46	113.2	13.71	8847	32.0	FLAT
MB MED	4.30	109.2	4.59	116.4	14.49	9347	31.7	FLAT
MB LRG	4.41	111.9	4.74	120.3	15.26	9847	32.9	FLAT
MB MED/LRG (Q-Rear)	4.10	104.0	4.26	108.0	12.64	8158	32.4	50/50
AM XS	4.26	108.1	4.26	108.0	13.02	8400	35.5	FLAT
AM SML	4.37	111.0	4.37	111.0	13.71	8846	35.5	FLAT
AM MED (Side)	4.57	116.0	4.53	115.0	14.89	9608	36.6	FLAT
AM MED (Ctr)	4.33	110.0	4.41	112.0	13.72	8852	35.0	FLAT
AM MED (Q-Rear)	4.10	104.1	4.26	108.0	12.64	8158	32.4	50/50
AM LRG (Side)	4.61	117.1	4.69	119.0	15.63	10083	36.3	FLAT
AM LRG (Ctr)	4.47	113.5	4.45	113.0	14.68	9469	38.6	50/50
AM LRG (Q-Rear)	4.10	104.1	4.26	108.0	12.64	8158	32.4	50/50
CI MED	4.39	111.4	4.59	116.4	15.04	9700	30.3	FLAT
CI LRG	4.50	114.2	4.70	119.3	15.79	10190	30.3	FLAT
CC MED	4.39	111.5	4.58	116.3	15.28	9860	33.7	FLAT
CC MED (Q-Rear)	3.83	97.2	3.99	101.3	11.08	7150	32.4	80/20
CC LRG	4.50	114.3	4.70	119.2	16.06	10360	33.7	FLAT
CC LRG (Q-Rear)	4.09	103.7	4.26	108.1	12.63	8150	32.4	80/20
SHARPEYE MED	4.48	113.6	4.55	115.4	15.13	9761	34.8	FLAT/BEV
SHARPEYE LRG	4.59	116.5	4.66	118.3	15.91	10263	34.8	FLAT/BEV
TOKORO MED (Ctr)	4.43	112.5	4.44	112.7	14.25	9196	35.2	50/50
TOKORO MED (Side)	4.50	114.1	4.50	114.2	14.65	9449	35.2	FLAT
TOKORO LRG (Ctr)	4.55	115.5	4.56	115.7	15.03	9696	35.2	50/50
TOKORO LRG (Side)	4.61	117.0	4.62	117.2	15.42	9948	35.2	FLAT
GL MED	4.21	107.0	4.21	119.7	14.84	9572	31.1	FLAT
GL (Q-Rear)	3.77	95.8	3.74	95.2	9.38	6054	31.4	FLAT
AIPA (Side)	4.87	123.7	5.43	137.7	19.24	12410	33.6	50/50
AIPA (Ctr)	3.33	84.5	3.13	79.5	7.91	5103	34.6	50/50

Specialty Series Fins

	BASE ”	BASE MM	DEPTH ”	DEPTH MM	AREA ”	AREA MM	SWEEP DEG.	FOIL
SPLIT QUAD (Side)	5.41	137.3	4.79	121.5	19.27	12432	42.5	FLAT
SPLIT QUAD (Q-Rear)	4.03	102.2	4.40	118.8	12.63	8150	28.5	80/20
MB QUAD (Side)	5.27	133.7	4.66	118.4	18.31	11810	42.5	FLAT
MB QUAD (Q-Rear)	4.03	102.2	4.40	111.8	12.63	8150	28.5	80/20
MODERN KEEL	6.41	162.8	5.50	139.5	25.05	16160	32.8	FLAT
RETRO KEEL	7.28	184.8	4.73	120.0	22.58	14565	38.3	80/20
CI KEEL	6.41	162.8	5.15	130.8	25.53	16474	37.0	FLAT
ALBUM KEEL	5.96	151.3	5.22	132.5	22.74	14672	38.2	FLAT
PERFORMER KEEL	6.69	169.9	5.25	133.3	26.42	17043	32.7	FLAT
PERFORMER QUAD (Side)	5.63	143.0	4.83	122.8	21.16	13654	35.7	FLAT
PERFORMER QUAD (Q-Rear)	4.11	104.5	3.12	79.3	9.65	6223	34.2	FLAT
PERFORMER TWIN	5.00	126.8	5.15	130.9	19.14	12350	33.3	FLAT
PERFORMER TWIN (+1)	3.73	94.8	3.83	97.2	11.32	7300	37.3	50/50
MR TWIN	5.06	128.4	5.56	141.1	21.06	13590	32.1	FLAT
MR TWIN (+1)	3.31	84.0	3.34	84.8	8.23	5307	29.1	50/50
MR FREERIDE TWIN	5.08	129.0	6.09	154.8	22.84	14733	28.4	FLAT
OTIS TWIN	5.26	133.6	5.35	135.8	21.44	13835	32.7	FLAT
OTIS TWIN (+1)	3.30	83.7	3.45	87.6	8.71	5620	32.7	50/50
ALBUM TWIN	5.17	131.4	5.44	138.1	20.62	13306	32.8	FLAT
ALBUM TWIN (+1)	3.29	83.5	3.51	89.1	8.93	5759	29.3	50/50
BM TWIN	5.66	143.7	5.41	137.4	23.24	14991	35.2	FLAT
AM TWIN	5.07	128.6	5.61	142.3	20.37	13140	32.1	FLAT
AM TWIN (+1)	3.45	87.5	3.69	93.6	9.46	6100	36.9	50/50
POWER TWIN	5.26	133.6	5.35	135.8	21.44	13835	32.7	FLAT
POWER TWIN (+1)	3.30	83.7	3.45	87.6	8.71	5620	33.6	50/50
POWER TWIN S-M	5.00	126.9	5.10	129.0	19.45	12546	32.7	FLAT
POWER TWIN S-M (+1)	3.10	78.6	3.25	82.4	7.86	5070	33.6	50/50
CHRISTENSON KEEL	6.39	162.1	5.08	128.9	23.64	15250	34.7	FLAT
CHRISTENSON TWIN	5.14	130.5	5.22	132.5	19.75	12744	34.7	FLAT
MF TWIN	5.05	128.2	5.32	135.0	20.63	13308	37.0	FLAT/BEV
MF TWIN (+1)	3.72	94.5	3.79	96.1	10.39	6700	32.9	50/50
JS POWER TWIN	5.26	133.6	5.35	135.8	21.44	13835	32.7	FLAT
JS POWER TWIN + 1	3.30	83.7	3.45	87.6	8.71	5620	33.6	50/50
JS MODERN KEEL	6.41	162.8	5.50	139.5	25.05	16160	32.8	FLAT
NF BW G10 Tri Side	4.34	110.2	4.58	116.3	15.25	9838	32.1	80/20
NF BW G10 Tri Ctr	4.42	112.2	4.55	115.4	15.28	9855	33.8	50/50
NF BW Quad Side	3.98	100.9	4.40	111.8	12.64	8153	28.9	70/30
NF BW G10 Quad Rear	3.98	100.9	4.40	111.8	12.64	8153	28.9	50/50

FCS II Longboard Fins

	BASE ”	BASE MM	DEPTH ”	DEPTH MM	AREA ”	AREA MM	SWEEP DEG.	FOIL
ESSENTIAL
LB CONNECT 6”	4.27	108.5	6.00	152.4	17.65	11390	33.7	50/50
LB CONNECT 7”	4.99	126.6	7.01	177.9	24.05	15518	33.7	50/50
LB CONNECT 8”	5.64	143.1	7.96	202.0	30.71	19812	33.7	50/50
LB CONNECT 9”	6.43	163.1	9.03	229.2	39.91	25748	33.7	50/50
LB CONNECT 10”	7.13	180.9	10.01	254.1	49.06	31653	33.7	50/50
LB FLOW II 8.5”	6.42	162.9	8.50	215.7	30.91	19944	33.1	50/50
LB FLOW II 9.5”	7.17	182.1	9.50	241.2	38.64	24928	33.1	50/50
LB FLOW II 10.5”	7.96	202.0	10.54	267.5	47.53	30667	33.1	50/50
LB PIVOT II 9.75”	7.29	184.9	9.75	247.7	52.08	33599	27.7	50/50
LB PIVOT II 10.25”	7.66	194.3	10.25	260.4	57.49	37091	27.7	50/50
LB PIVOT II 10.75”	8.03	203.9	10.75	273.1	63.31	40842	27.7	50/50
SIGNATURE
LB KELIA 9.75”	7.11	180.4	9.75	247.5	39.56	25523	33.8	50/50
LB THOMAS 9.75”	6.85	173.8	9.76	247.6	37.29	24059	30.5	50/50
LB THOMAS 10.25”	7.20	182.8	10.26	260.3	41.67	26881	30.5	50/50
LB THOMAS 10.75”	7.55	191.7	10.76	273.0	45.36	29265	30.5	50/50
LB THOMAS 11.5”	8.08	205.0	11.51	292.1	51.88	33471	30.5	50/50
LB CHRISTENSON 7.5”	5.43	137.8	7.51	190.5	24.54	15833	33.3	50/50
LB CHRISTENSON 8”	5.79	147.0	8.01	203.2	27.92	18015	33.3	50/50
LB CHRISTENSON 8.5”	6.15	156.2	8.51	215.9	31.52	20337	33.3	50/50
LB CHRISTENSON 9”	6.52	165.4	9.01	228.6	35.34	22800	33.3	50/50
LB CHRISTENSON 9.5”	6.91	175.4	9.51	241.3	39.38	25404	33.3	50/50
LB WAXHEAD 10”	6.82	173.2	10.01	254.0	42.60	27487	29.8	50/50
LB SKINDOG 7”	5.32	135.0	6.98	177.1	31.69	16869	30.5	50/50
SPECIALTY
LB CLIQUE 7”	4.74	120.3	7.01	177.8	21.95	14162	34.5	50/50
LB CLIQUE 8”	5.42	137.5	8.01	203.2	28.67	18497	34.5	50/50
LB CLIQUE 9”	6.10	154.7	9.01	228.6	36.29	23410	34.5	50/50
SINGLE FIN 6”	4.89	124.0	6.00	152.4	21.19	13672	32.7	50/50
SINGLE FIN 7”	5.70	144.7	7.01	177.8	28.84	18607	32.7	50/50
SINGLE FIN 8”	6.51	165.3	8.01	203.2	37.67	24304	32.7	50/50
SIDE BYTES
CARVER SML SIDE BYTE	3.86	98.0	3.93	99.8	11.07	7140	33.2	FLAT
CONNECT SML SIDE BYTE	3.64	92.3	3.62	92.0	9.30	6000	29.9	FLAT
SKINDOG MED SIDE BYTE	4.39	111.5	4.58	116.3	15.28	9860	33.7	FLAT
HYBRID
HARLEY SINGLE 5.5”	4.84	122.8	5.27	133.7	18.50	11937	32.1	50/50
HARLEY XXL	4.61	117.0	4.99	126.7	16.93	10923	34.0	FLAT
HARLEY XXL (Q-REAR)	4.10	104.0	4.26	108.0	12.64	8158	32.4	80/20
HARLEY MID	4.45	112.9	4.70	119.3	16.03	10341	32.0	FLAT
HARLEY MID (CTR)	4.40	111.7	4.54	115.2	14.80	9550	30.7	50/50
HARLEY MID (Q-REAR)	4.09	103.7	4.26	108.1	12.63	8150	32.4	80/20
MID SINGLE 6.5”	4.89	124.1	6.50	165.1	22.78	14697	30.7	50/50
MID SINGLE 7”	5.27	133.7	7.00	177.8	26.42	17046	30.7	50/50
MID SIDE BYTE	3.43	87.1	3.62	92.0	9.28	5990	28.6	FLAT
MID CARVER	4.69	119.1	4.77	121.1	16.52	10657	37.0	FLAT
MID CARVER (+1)	4.48	113.7	4.66	118.4	15.58	10052	33.8	50/50

This page can be printed as a PDF

All FCS fins are classified by the following characteristics; Base, Depth, Area and Sweep.

Understanding how these fin characteristics can change the performance of your surfboard is an important consideration when working out which FCS fins are best for you.

BASE
Base is the length between the leading and trailing edge where the fin meets the board. Base is primarily linked to drive. Fins with a longer base will offer substantially more drive and acceleration.

DEPTH
Depth is the distance the fin penetrates into the water. Depth directly relates to hold. The greater the depth the more hold, the shorter the depth the more a board will slide and release.

SWEEP
Sweep is the angle measuring how far the outline of the fin is curved backwards; also referred to as rake. Sweep has a direct influence on pivot. Fins with more sweep produce a longer turning arc, less sweep offers a tighter turning arc.

AREA
Area is the total surface area of the fin.

DI = Discontinued item

New Sizing for Specialty Fins

You may notice new size ratings for our Specialty Fin Range. Previously, all Specialty Series fins were rated an XL. To better reflect fin sizing, we now have 3 new size categories: S-M, M-L, and L-XL.

Please refer to the Size/Fin Data to compare dimensions.

Need More Info?

Read: The Guide To FCS Fins

Watch Video: Find Your Fin - The FCS Fin Clinic